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iwlwifi: Add a000 HW family support
[linux-2.6-block.git] / drivers / net / wireless / intel / iwlwifi / pcie / trans.c
CommitLineData
c85eb619
EG		 1/******************************************************************************
2 *
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
5 *
6 * GPL LICENSE SUMMARY
7 *
553452e5
LK		 8 * Copyright(c) 2007 - 2015 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
62d7476d 10 * Copyright(c) 2016 Intel Deutschland GmbH
c85eb619
EG		 11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of version 2 of the GNU General Public License as
14 * published by the Free Software Foundation.
15 *
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
24 * USA
25 *
26 * The full GNU General Public License is included in this distribution
410dc5aa 27 * in the file called COPYING.
c85eb619
EG		 28 *
29 * Contact Information:
cb2f8277 30 * Intel Linux Wireless <linuxwifi@intel.com>
c85eb619
EG		 31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
32 *
33 * BSD LICENSE
34 *
553452e5
LK		 35 * Copyright(c) 2005 - 2015 Intel Corporation. All rights reserved.
36 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
62d7476d 37 * Copyright(c) 2016 Intel Deutschland GmbH
c85eb619
EG		 38 * All rights reserved.
39 *
40 * Redistribution and use in source and binary forms, with or without
41 * modification, are permitted provided that the following conditions
42 * are met:
43 *
44 * * Redistributions of source code must retain the above copyright
45 * notice, this list of conditions and the following disclaimer.
46 * * Redistributions in binary form must reproduce the above copyright
47 * notice, this list of conditions and the following disclaimer in
48 * the documentation and/or other materials provided with the
49 * distribution.
50 * * Neither the name Intel Corporation nor the names of its
51 * contributors may be used to endorse or promote products derived
52 * from this software without specific prior written permission.
53 *
54 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
55 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
56 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
57 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
58 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
59 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
60 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
61 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
62 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
63 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
64 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
65 *
66 *****************************************************************************/
a42a1844
EG		 67#include <linux/pci.h>
68#include <linux/pci-aspm.h>
e6bb4c9c 69#include <linux/interrupt.h>
87e5666c 70#include <linux/debugfs.h>
cf614297 71#include <linux/sched.h>
6d8f6eeb
EG		 72#include <linux/bitops.h>
73#include <linux/gfp.h>
48eb7b34 74#include <linux/vmalloc.h>
b3ff1270 75#include <linux/pm_runtime.h>
e6bb4c9c 76
82575102 77#include "iwl-drv.h"
c85eb619 78#include "iwl-trans.h"
522376d2
EG		 79#include "iwl-csr.h"
80#include "iwl-prph.h"
cb6bb128 81#include "iwl-scd.h"
7a10e3e4 82#include "iwl-agn-hw.h"
4d075007 83#include "iwl-fw-error-dump.h"
6468a01a 84#include "internal.h"
06d51e0d 85#include "iwl-fh.h"
0439bb62 86
fe45773b
AN		 87/* extended range in FW SRAM */
88#define IWL_FW_MEM_EXTENDED_START 0x40000
89#define IWL_FW_MEM_EXTENDED_END 0x57FFF
90
c2d20201
EG		 91static void iwl_pcie_free_fw_monitor(struct iwl_trans *trans)
92{
93 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
94
95 if (!trans_pcie->fw_mon_page)
96 return;
97
98 dma_unmap_page(trans->dev, trans_pcie->fw_mon_phys,
99 trans_pcie->fw_mon_size, DMA_FROM_DEVICE);
100 __free_pages(trans_pcie->fw_mon_page,
101 get_order(trans_pcie->fw_mon_size));
102 trans_pcie->fw_mon_page = NULL;
103 trans_pcie->fw_mon_phys = 0;
104 trans_pcie->fw_mon_size = 0;
105}
106
96c285da 107static void iwl_pcie_alloc_fw_monitor(struct iwl_trans *trans, u8 max_power)
c2d20201
EG		 108{
109 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
553452e5 110 struct page *page = NULL;
c2d20201 111 dma_addr_t phys;
96c285da 112 u32 size = 0;
c2d20201
EG		 113 u8 power;
114
96c285da
EG		 115 if (!max_power) {
116 /* default max_power is maximum */
117 max_power = 26;
118 } else {
119 max_power += 11;
120 }
121
122 if (WARN(max_power > 26,
123 "External buffer size for monitor is too big %d, check the FW TLV\n",
124 max_power))
125 return;
126
c2d20201
EG		 127 if (trans_pcie->fw_mon_page) {
128 dma_sync_single_for_device(trans->dev, trans_pcie->fw_mon_phys,
129 trans_pcie->fw_mon_size,
130 DMA_FROM_DEVICE);
131 return;
132 }
133
134 phys = 0;
96c285da 135 for (power = max_power; power >= 11; power--) {
c2d20201
EG		 136 int order;
137
138 size = BIT(power);
139 order = get_order(size);
140 page = alloc_pages(__GFP_COMP | __GFP_NOWARN | __GFP_ZERO,
141 order);
142 if (!page)
143 continue;
144
145 phys = dma_map_page(trans->dev, page, 0, PAGE_SIZE << order,
146 DMA_FROM_DEVICE);
147 if (dma_mapping_error(trans->dev, phys)) {
148 __free_pages(page, order);
553452e5 149 page = NULL;
c2d20201
EG		 150 continue;
151 }
152 IWL_INFO(trans,
153 "Allocated 0x%08x bytes (order %d) for firmware monitor.\n",
154 size, order);
155 break;
156 }
157
40a76905 158 if (WARN_ON_ONCE(!page))
c2d20201
EG		 159 return;
160
96c285da
EG		 161 if (power != max_power)
162 IWL_ERR(trans,
163 "Sorry - debug buffer is only %luK while you requested %luK\n",
164 (unsigned long)BIT(power - 10),
165 (unsigned long)BIT(max_power - 10));
166
c2d20201
EG		 167 trans_pcie->fw_mon_page = page;
168 trans_pcie->fw_mon_phys = phys;
169 trans_pcie->fw_mon_size = size;
170}
171
a812cba9
AB		 172static u32 iwl_trans_pcie_read_shr(struct iwl_trans *trans, u32 reg)
173{
174 iwl_write32(trans, HEEP_CTRL_WRD_PCIEX_CTRL_REG,
175 ((reg & 0x0000ffff) | (2 << 28)));
176 return iwl_read32(trans, HEEP_CTRL_WRD_PCIEX_DATA_REG);
177}
178
179static void iwl_trans_pcie_write_shr(struct iwl_trans *trans, u32 reg, u32 val)
180{
181 iwl_write32(trans, HEEP_CTRL_WRD_PCIEX_DATA_REG, val);
182 iwl_write32(trans, HEEP_CTRL_WRD_PCIEX_CTRL_REG,
183 ((reg & 0x0000ffff) | (3 << 28)));
184}
185
ddaf5a5b 186static void iwl_pcie_set_pwr(struct iwl_trans *trans, bool vaux)
392f8b78 187{
66337b7c 188 if (trans->cfg->apmg_not_supported)
95411d04
AA		 189 return;
190
ddaf5a5b
JB		 191 if (vaux && pci_pme_capable(to_pci_dev(trans->dev), PCI_D3cold))
192 iwl_set_bits_mask_prph(trans, APMG_PS_CTRL_REG,
193 APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
194 ~APMG_PS_CTRL_MSK_PWR_SRC);
195 else
196 iwl_set_bits_mask_prph(trans, APMG_PS_CTRL_REG,
197 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
198 ~APMG_PS_CTRL_MSK_PWR_SRC);
392f8b78
EG		 199}
200
af634bee
EG		 201/* PCI registers */
202#define PCI_CFG_RETRY_TIMEOUT 0x041
af634bee 203
7afe3705 204static void iwl_pcie_apm_config(struct iwl_trans *trans)
af634bee 205{
20d3b647 206 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
7afe3705 207 u16 lctl;
9180ac50 208 u16 cap;
af634bee 209
af634bee
EG		 210 /*
211 * HW bug W/A for instability in PCIe bus L0S->L1 transition.
212 * Check if BIOS (or OS) enabled L1-ASPM on this device.
213 * If so (likely), disable L0S, so device moves directly L0->L1;
214 * costs negligible amount of power savings.
215 * If not (unlikely), enable L0S, so there is at least some
216 * power savings, even without L1.
217 */
7afe3705 218 pcie_capability_read_word(trans_pcie->pci_dev, PCI_EXP_LNKCTL, &lctl);
9180ac50 219 if (lctl & PCI_EXP_LNKCTL_ASPM_L1)
af634bee 220 iwl_set_bit(trans, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED);
9180ac50 221 else
af634bee 222 iwl_clear_bit(trans, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED);
438a0f0a 223 trans->pm_support = !(lctl & PCI_EXP_LNKCTL_ASPM_L0S);
9180ac50
EG		 224
225 pcie_capability_read_word(trans_pcie->pci_dev, PCI_EXP_DEVCTL2, &cap);
226 trans->ltr_enabled = cap & PCI_EXP_DEVCTL2_LTR_EN;
227 dev_info(trans->dev, "L1 %sabled - LTR %sabled\n",
228 (lctl & PCI_EXP_LNKCTL_ASPM_L1) ? "En" : "Dis",
229 trans->ltr_enabled ? "En" : "Dis");
af634bee
EG		 230}
231
a6c684ee
EG		 232/*
233 * Start up NIC's basic functionality after it has been reset
7afe3705 234 * (e.g. after platform boot, or shutdown via iwl_pcie_apm_stop())
a6c684ee
EG		 235 * NOTE: This does not load uCode nor start the embedded processor
236 */
7afe3705 237static int iwl_pcie_apm_init(struct iwl_trans *trans)
a6c684ee
EG		 238{
239 int ret = 0;
240 IWL_DEBUG_INFO(trans, "Init card's basic functions\n");
241
242 /*
243 * Use "set_bit" below rather than "write", to preserve any hardware
244 * bits already set by default after reset.
245 */
246
247 /* Disable L0S exit timer (platform NMI Work/Around) */
e4a9f8ce
EH		 248 if (trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
249 iwl_set_bit(trans, CSR_GIO_CHICKEN_BITS,
250 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
a6c684ee
EG		 251
252 /*
253 * Disable L0s without affecting L1;
254 * don't wait for ICH L0s (ICH bug W/A)
255 */
256 iwl_set_bit(trans, CSR_GIO_CHICKEN_BITS,
20d3b647 257 CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
a6c684ee
EG		 258
259 /* Set FH wait threshold to maximum (HW error during stress W/A) */
260 iwl_set_bit(trans, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
261
262 /*
263 * Enable HAP INTA (interrupt from management bus) to
264 * wake device's PCI Express link L1a -> L0s
265 */
266 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
20d3b647 267 CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
a6c684ee 268
7afe3705 269 iwl_pcie_apm_config(trans);
a6c684ee
EG		 270
271 /* Configure analog phase-lock-loop before activating to D0A */
77d76931
JB		 272 if (trans->cfg->base_params->pll_cfg)
273 iwl_set_bit(trans, CSR_ANA_PLL_CFG, CSR50_ANA_PLL_CFG_VAL);
a6c684ee
EG		 274
275 /*
276 * Set "initialization complete" bit to move adapter from
277 * D0U* --> D0A* (powered-up active) state.
278 */
279 iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
280
281 /*
282 * Wait for clock stabilization; once stabilized, access to
283 * device-internal resources is supported, e.g. iwl_write_prph()
284 * and accesses to uCode SRAM.
285 */
286 ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
20d3b647
JB		 287 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
288 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
a6c684ee
EG		 289 if (ret < 0) {
290 IWL_DEBUG_INFO(trans, "Failed to init the card\n");
291 goto out;
292 }
293
2d93aee1
EG		 294 if (trans->cfg->host_interrupt_operation_mode) {
295 /*
296 * This is a bit of an abuse - This is needed for 7260 / 3160
297 * only check host_interrupt_operation_mode even if this is
298 * not related to host_interrupt_operation_mode.
299 *
300 * Enable the oscillator to count wake up time for L1 exit. This
301 * consumes slightly more power (100uA) - but allows to be sure
302 * that we wake up from L1 on time.
303 *
304 * This looks weird: read twice the same register, discard the
305 * value, set a bit, and yet again, read that same register
306 * just to discard the value. But that's the way the hardware
307 * seems to like it.
308 */
309 iwl_read_prph(trans, OSC_CLK);
310 iwl_read_prph(trans, OSC_CLK);
311 iwl_set_bits_prph(trans, OSC_CLK, OSC_CLK_FORCE_CONTROL);
312 iwl_read_prph(trans, OSC_CLK);
313 iwl_read_prph(trans, OSC_CLK);
314 }
315
a6c684ee
EG		 316 /*
317 * Enable DMA clock and wait for it to stabilize.
318 *
3073d8c0
EH		 319 * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0"
320 * bits do not disable clocks. This preserves any hardware
321 * bits already set by default in "CLK_CTRL_REG" after reset.
a6c684ee 322 */
95411d04 323 if (!trans->cfg->apmg_not_supported) {
3073d8c0
EH		 324 iwl_write_prph(trans, APMG_CLK_EN_REG,
325 APMG_CLK_VAL_DMA_CLK_RQT);
326 udelay(20);
327
328 /* Disable L1-Active */
329 iwl_set_bits_prph(trans, APMG_PCIDEV_STT_REG,
330 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
331
332 /* Clear the interrupt in APMG if the NIC is in RFKILL */
333 iwl_write_prph(trans, APMG_RTC_INT_STT_REG,
334 APMG_RTC_INT_STT_RFKILL);
335 }
889b1696 336
eb7ff77e 337 set_bit(STATUS_DEVICE_ENABLED, &trans->status);
a6c684ee
EG		 338
339out:
340 return ret;
341}
342
a812cba9
AB		 343/*
344 * Enable LP XTAL to avoid HW bug where device may consume much power if
345 * FW is not loaded after device reset. LP XTAL is disabled by default
346 * after device HW reset. Do it only if XTAL is fed by internal source.
347 * Configure device's "persistence" mode to avoid resetting XTAL again when
348 * SHRD_HW_RST occurs in S3.
349 */
350static void iwl_pcie_apm_lp_xtal_enable(struct iwl_trans *trans)
351{
352 int ret;
353 u32 apmg_gp1_reg;
354 u32 apmg_xtal_cfg_reg;
355 u32 dl_cfg_reg;
356
357 /* Force XTAL ON */
358 __iwl_trans_pcie_set_bit(trans, CSR_GP_CNTRL,
359 CSR_GP_CNTRL_REG_FLAG_XTAL_ON);
360
361 /* Reset entire device - do controller reset (results in SHRD_HW_RST) */
362 iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
b7a08b28 363 usleep_range(1000, 2000);
a812cba9
AB		 364
365 /*
366 * Set "initialization complete" bit to move adapter from
367 * D0U* --> D0A* (powered-up active) state.
368 */
369 iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
370
371 /*
372 * Wait for clock stabilization; once stabilized, access to
373 * device-internal resources is possible.
374 */
375 ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
376 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
377 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
378 25000);
379 if (WARN_ON(ret < 0)) {
380 IWL_ERR(trans, "Access time out - failed to enable LP XTAL\n");
381 /* Release XTAL ON request */
382 __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL,
383 CSR_GP_CNTRL_REG_FLAG_XTAL_ON);
384 return;
385 }
386
387 /*
388 * Clear "disable persistence" to avoid LP XTAL resetting when
389 * SHRD_HW_RST is applied in S3.
390 */
391 iwl_clear_bits_prph(trans, APMG_PCIDEV_STT_REG,
392 APMG_PCIDEV_STT_VAL_PERSIST_DIS);
393
394 /*
395 * Force APMG XTAL to be active to prevent its disabling by HW
396 * caused by APMG idle state.
397 */
398 apmg_xtal_cfg_reg = iwl_trans_pcie_read_shr(trans,
399 SHR_APMG_XTAL_CFG_REG);
400 iwl_trans_pcie_write_shr(trans, SHR_APMG_XTAL_CFG_REG,
401 apmg_xtal_cfg_reg |
402 SHR_APMG_XTAL_CFG_XTAL_ON_REQ);
403
404 /*
405 * Reset entire device again - do controller reset (results in
406 * SHRD_HW_RST). Turn MAC off before proceeding.
407 */
408 iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
b7a08b28 409 usleep_range(1000, 2000);
a812cba9
AB		 410
411 /* Enable LP XTAL by indirect access through CSR */
412 apmg_gp1_reg = iwl_trans_pcie_read_shr(trans, SHR_APMG_GP1_REG);
413 iwl_trans_pcie_write_shr(trans, SHR_APMG_GP1_REG, apmg_gp1_reg |
414 SHR_APMG_GP1_WF_XTAL_LP_EN |
415 SHR_APMG_GP1_CHICKEN_BIT_SELECT);
416
417 /* Clear delay line clock power up */
418 dl_cfg_reg = iwl_trans_pcie_read_shr(trans, SHR_APMG_DL_CFG_REG);
419 iwl_trans_pcie_write_shr(trans, SHR_APMG_DL_CFG_REG, dl_cfg_reg &
420 ~SHR_APMG_DL_CFG_DL_CLOCK_POWER_UP);
421
422 /*
423 * Enable persistence mode to avoid LP XTAL resetting when
424 * SHRD_HW_RST is applied in S3.
425 */
426 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
427 CSR_HW_IF_CONFIG_REG_PERSIST_MODE);
428
429 /*
430 * Clear "initialization complete" bit to move adapter from
431 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
432 */
433 iwl_clear_bit(trans, CSR_GP_CNTRL,
434 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
435
436 /* Activates XTAL resources monitor */
437 __iwl_trans_pcie_set_bit(trans, CSR_MONITOR_CFG_REG,
438 CSR_MONITOR_XTAL_RESOURCES);
439
440 /* Release XTAL ON request */
441 __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL,
442 CSR_GP_CNTRL_REG_FLAG_XTAL_ON);
443 udelay(10);
444
445 /* Release APMG XTAL */
446 iwl_trans_pcie_write_shr(trans, SHR_APMG_XTAL_CFG_REG,
447 apmg_xtal_cfg_reg &
448 ~SHR_APMG_XTAL_CFG_XTAL_ON_REQ);
449}
450
7afe3705 451static int iwl_pcie_apm_stop_master(struct iwl_trans *trans)
cc56feb2
EG		 452{
453 int ret = 0;
454
455 /* stop device's busmaster DMA activity */
456 iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
457
458 ret = iwl_poll_bit(trans, CSR_RESET,
20d3b647
JB		 459 CSR_RESET_REG_FLAG_MASTER_DISABLED,
460 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
7f2ac8fb 461 if (ret < 0)
cc56feb2
EG		 462 IWL_WARN(trans, "Master Disable Timed Out, 100 usec\n");
463
464 IWL_DEBUG_INFO(trans, "stop master\n");
465
466 return ret;
467}
468
b7aaeae4 469static void iwl_pcie_apm_stop(struct iwl_trans *trans, bool op_mode_leave)
cc56feb2
EG		 470{
471 IWL_DEBUG_INFO(trans, "Stop card, put in low power state\n");
472
b7aaeae4
EG		 473 if (op_mode_leave) {
474 if (!test_bit(STATUS_DEVICE_ENABLED, &trans->status))
475 iwl_pcie_apm_init(trans);
476
477 /* inform ME that we are leaving */
478 if (trans->cfg->device_family == IWL_DEVICE_FAMILY_7000)
479 iwl_set_bits_prph(trans, APMG_PCIDEV_STT_REG,
480 APMG_PCIDEV_STT_VAL_WAKE_ME);
c9fdec9f
EG		 481 else if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000) {
482 iwl_set_bit(trans, CSR_DBG_LINK_PWR_MGMT_REG,
483 CSR_RESET_LINK_PWR_MGMT_DISABLED);
b7aaeae4
EG		 484 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
485 CSR_HW_IF_CONFIG_REG_PREPARE |
486 CSR_HW_IF_CONFIG_REG_ENABLE_PME);
c9fdec9f
EG		 487 mdelay(1);
488 iwl_clear_bit(trans, CSR_DBG_LINK_PWR_MGMT_REG,
489 CSR_RESET_LINK_PWR_MGMT_DISABLED);
490 }
b7aaeae4
EG		 491 mdelay(5);
492 }
493
eb7ff77e 494 clear_bit(STATUS_DEVICE_ENABLED, &trans->status);
cc56feb2
EG		 495
496 /* Stop device's DMA activity */
7afe3705 497 iwl_pcie_apm_stop_master(trans);
cc56feb2 498
a812cba9
AB		 499 if (trans->cfg->lp_xtal_workaround) {
500 iwl_pcie_apm_lp_xtal_enable(trans);
501 return;
502 }
503
cc56feb2
EG		 504 /* Reset the entire device */
505 iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
b7a08b28 506 usleep_range(1000, 2000);
cc56feb2
EG		 507
508 /*
509 * Clear "initialization complete" bit to move adapter from
510 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
511 */
512 iwl_clear_bit(trans, CSR_GP_CNTRL,
513 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
514}
515
7afe3705 516static int iwl_pcie_nic_init(struct iwl_trans *trans)
392f8b78 517{
7b11488f 518 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
392f8b78
EG		 519
520 /* nic_init */
7b70bd63 521 spin_lock(&trans_pcie->irq_lock);
7afe3705 522 iwl_pcie_apm_init(trans);
392f8b78 523
7b70bd63 524 spin_unlock(&trans_pcie->irq_lock);
392f8b78 525
95411d04 526 iwl_pcie_set_pwr(trans, false);
392f8b78 527
ecdb975c 528 iwl_op_mode_nic_config(trans->op_mode);
392f8b78
EG		 529
530 /* Allocate the RX queue, or reset if it is already allocated */
9805c446 531 iwl_pcie_rx_init(trans);
392f8b78
EG		 532
533 /* Allocate or reset and init all Tx and Command queues */
f02831be 534 if (iwl_pcie_tx_init(trans))
392f8b78
EG		 535 return -ENOMEM;
536
035f7ff2 537 if (trans->cfg->base_params->shadow_reg_enable) {
392f8b78 538 /* enable shadow regs in HW */
20d3b647 539 iwl_set_bit(trans, CSR_MAC_SHADOW_REG_CTRL, 0x800FFFFF);
d38069d1 540 IWL_DEBUG_INFO(trans, "Enabling shadow registers in device\n");
392f8b78
EG		 541 }
542
392f8b78
EG		 543 return 0;
544}
545
546#define HW_READY_TIMEOUT (50)
547
548/* Note: returns poll_bit return value, which is >= 0 if success */
7afe3705 549static int iwl_pcie_set_hw_ready(struct iwl_trans *trans)
392f8b78
EG		 550{
551 int ret;
552
1042db2a 553 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
20d3b647 554 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
392f8b78
EG		 555
556 /* See if we got it */
1042db2a 557 ret = iwl_poll_bit(trans, CSR_HW_IF_CONFIG_REG,
20d3b647
JB		 558 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
559 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
560 HW_READY_TIMEOUT);
392f8b78 561
6a08f514
EG		 562 if (ret >= 0)
563 iwl_set_bit(trans, CSR_MBOX_SET_REG, CSR_MBOX_SET_REG_OS_ALIVE);
564
6d8f6eeb 565 IWL_DEBUG_INFO(trans, "hardware%s ready\n", ret < 0 ? " not" : "");
392f8b78
EG		 566 return ret;
567}
568
569/* Note: returns standard 0/-ERROR code */
7afe3705 570static int iwl_pcie_prepare_card_hw(struct iwl_trans *trans)
392f8b78
EG		 571{
572 int ret;
289e5501 573 int t = 0;
501fd989 574 int iter;
392f8b78 575
6d8f6eeb 576 IWL_DEBUG_INFO(trans, "iwl_trans_prepare_card_hw enter\n");
392f8b78 577
7afe3705 578 ret = iwl_pcie_set_hw_ready(trans);
ebb7678d 579 /* If the card is ready, exit 0 */
392f8b78
EG		 580 if (ret >= 0)
581 return 0;
582
c9fdec9f
EG		 583 iwl_set_bit(trans, CSR_DBG_LINK_PWR_MGMT_REG,
584 CSR_RESET_LINK_PWR_MGMT_DISABLED);
192185d6 585 usleep_range(1000, 2000);
c9fdec9f 586
501fd989
EG		 587 for (iter = 0; iter < 10; iter++) {
588 /* If HW is not ready, prepare the conditions to check again */
589 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
590 CSR_HW_IF_CONFIG_REG_PREPARE);
591
592 do {
593 ret = iwl_pcie_set_hw_ready(trans);
03a19cbb
EG		 594 if (ret >= 0)
595 return 0;
392f8b78 596
501fd989
EG		 597 usleep_range(200, 1000);
598 t += 200;
599 } while (t < 150000);
600 msleep(25);
601 }
392f8b78 602
7f2ac8fb 603 IWL_ERR(trans, "Couldn't prepare the card\n");
392f8b78 604
392f8b78
EG		 605 return ret;
606}
607
cf614297
EG		 608/*
609 * ucode
610 */
7afe3705 611static int iwl_pcie_load_firmware_chunk(struct iwl_trans *trans, u32 dst_addr,
83f84d7b 612 dma_addr_t phy_addr, u32 byte_cnt)
cf614297 613{
13df1aab 614 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
bac842da 615 unsigned long flags;
cf614297
EG		 616 int ret;
617
13df1aab 618 trans_pcie->ucode_write_complete = false;
cf614297 619
bac842da
EG		 620 if (!iwl_trans_grab_nic_access(trans, &flags))
621 return -EIO;
622
623 iwl_write32(trans, FH_TCSR_CHNL_TX_CONFIG_REG(FH_SRVC_CHNL),
624 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_PAUSE);
625
626 iwl_write32(trans, FH_SRVC_CHNL_SRAM_ADDR_REG(FH_SRVC_CHNL),
627 dst_addr);
628
629 iwl_write32(trans, FH_TFDIB_CTRL0_REG(FH_SRVC_CHNL),
630 phy_addr & FH_MEM_TFDIB_DRAM_ADDR_LSB_MSK);
631
632 iwl_write32(trans, FH_TFDIB_CTRL1_REG(FH_SRVC_CHNL),
633 (iwl_get_dma_hi_addr(phy_addr)
634 << FH_MEM_TFDIB_REG1_ADDR_BITSHIFT) | byte_cnt);
635
636 iwl_write32(trans, FH_TCSR_CHNL_TX_BUF_STS_REG(FH_SRVC_CHNL),
637 BIT(FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_NUM) |
638 BIT(FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_IDX) |
639 FH_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_VALID);
640
641 iwl_write32(trans, FH_TCSR_CHNL_TX_CONFIG_REG(FH_SRVC_CHNL),
642 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
643 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_DISABLE |
644 FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_ENDTFD);
645
646 iwl_trans_release_nic_access(trans, &flags);
cf614297 647
13df1aab
JB		 648 ret = wait_event_timeout(trans_pcie->ucode_write_waitq,
649 trans_pcie->ucode_write_complete, 5 * HZ);
cf614297 650 if (!ret) {
83f84d7b 651 IWL_ERR(trans, "Failed to load firmware chunk!\n");
cf614297
EG		 652 return -ETIMEDOUT;
653 }
654
655 return 0;
656}
657
7afe3705 658static int iwl_pcie_load_section(struct iwl_trans *trans, u8 section_num,
83f84d7b 659 const struct fw_desc *section)
cf614297 660{
83f84d7b
JB		 661 u8 *v_addr;
662 dma_addr_t p_addr;
baa21e83 663 u32 offset, chunk_sz = min_t(u32, FH_MEM_TB_MAX_LENGTH, section->len);
cf614297
EG		 664 int ret = 0;
665
83f84d7b
JB		 666 IWL_DEBUG_FW(trans, "[%d] uCode section being loaded...\n",
667 section_num);
668
c571573a
EG		 669 v_addr = dma_alloc_coherent(trans->dev, chunk_sz, &p_addr,
670 GFP_KERNEL | __GFP_NOWARN);
671 if (!v_addr) {
672 IWL_DEBUG_INFO(trans, "Falling back to small chunks of DMA\n");
673 chunk_sz = PAGE_SIZE;
674 v_addr = dma_alloc_coherent(trans->dev, chunk_sz,
675 &p_addr, GFP_KERNEL);
676 if (!v_addr)
677 return -ENOMEM;
678 }
83f84d7b 679
c571573a 680 for (offset = 0; offset < section->len; offset += chunk_sz) {
fe45773b
AN		 681 u32 copy_size, dst_addr;
682 bool extended_addr = false;
83f84d7b 683
c571573a 684 copy_size = min_t(u32, chunk_sz, section->len - offset);
fe45773b
AN		 685 dst_addr = section->offset + offset;
686
687 if (dst_addr >= IWL_FW_MEM_EXTENDED_START &&
688 dst_addr <= IWL_FW_MEM_EXTENDED_END)
689 extended_addr = true;
690
691 if (extended_addr)
692 iwl_set_bits_prph(trans, LMPM_CHICK,
693 LMPM_CHICK_EXTENDED_ADDR_SPACE);
cf614297 694
83f84d7b 695 memcpy(v_addr, (u8 *)section->data + offset, copy_size);
fe45773b
AN		 696 ret = iwl_pcie_load_firmware_chunk(trans, dst_addr, p_addr,
697 copy_size);
698
699 if (extended_addr)
700 iwl_clear_bits_prph(trans, LMPM_CHICK,
701 LMPM_CHICK_EXTENDED_ADDR_SPACE);
702
83f84d7b
JB		 703 if (ret) {
704 IWL_ERR(trans,
705 "Could not load the [%d] uCode section\n",
706 section_num);
707 break;
6dfa8d01 708 }
83f84d7b
JB		 709 }
710
c571573a 711 dma_free_coherent(trans->dev, chunk_sz, v_addr, p_addr);
83f84d7b
JB		 712 return ret;
713}
714
16bc119b
EH		 715/*
716 * Driver Takes the ownership on secure machine before FW load
717 * and prevent race with the BT load.
718 * W/A for ROM bug. (should be remove in the next Si step)
719 */
720static int iwl_pcie_rsa_race_bug_wa(struct iwl_trans *trans)
721{
722 u32 val, loop = 1000;
723
1e167071
EH		 724 /*
725 * Check the RSA semaphore is accessible.
726 * If the HW isn't locked and the rsa semaphore isn't accessible,
727 * we are in trouble.
728 */
16bc119b
EH		 729 val = iwl_read_prph(trans, PREG_AUX_BUS_WPROT_0);
730 if (val & (BIT(1) | BIT(17))) {
9fc515bc
EG		 731 IWL_DEBUG_INFO(trans,
732 "can't access the RSA semaphore it is write protected\n");
16bc119b
EH		 733 return 0;
734 }
735
736 /* take ownership on the AUX IF */
737 iwl_write_prph(trans, WFPM_CTRL_REG, WFPM_AUX_CTL_AUX_IF_MAC_OWNER_MSK);
738 iwl_write_prph(trans, AUX_MISC_MASTER1_EN, AUX_MISC_MASTER1_EN_SBE_MSK);
739
740 do {
741 iwl_write_prph(trans, AUX_MISC_MASTER1_SMPHR_STATUS, 0x1);
742 val = iwl_read_prph(trans, AUX_MISC_MASTER1_SMPHR_STATUS);
743 if (val == 0x1) {
744 iwl_write_prph(trans, RSA_ENABLE, 0);
745 return 0;
746 }
747
748 udelay(10);
749 loop--;
750 } while (loop > 0);
751
752 IWL_ERR(trans, "Failed to take ownership on secure machine\n");
753 return -EIO;
754}
755
5dd9c68a
EG		 756static int iwl_pcie_load_cpu_sections_8000(struct iwl_trans *trans,
757 const struct fw_img *image,
758 int cpu,
759 int *first_ucode_section)
e2d6f4e7
EH		 760{
761 int shift_param;
dcab8ecd
EH		 762 int i, ret = 0, sec_num = 0x1;
763 u32 val, last_read_idx = 0;
e2d6f4e7
EH		 764
765 if (cpu == 1) {
766 shift_param = 0;
034846cf 767 *first_ucode_section = 0;
e2d6f4e7
EH		 768 } else {
769 shift_param = 16;
034846cf 770 (*first_ucode_section)++;
e2d6f4e7
EH		 771 }
772
034846cf
EH		 773 for (i = *first_ucode_section; i < IWL_UCODE_SECTION_MAX; i++) {
774 last_read_idx = i;
775
a6c4fb44
MG		 776 /*
777 * CPU1_CPU2_SEPARATOR_SECTION delimiter - separate between
778 * CPU1 to CPU2.
779 * PAGING_SEPARATOR_SECTION delimiter - separate between
780 * CPU2 non paged to CPU2 paging sec.
781 */
034846cf 782 if (!image->sec[i].data ||
a6c4fb44
MG		 783 image->sec[i].offset == CPU1_CPU2_SEPARATOR_SECTION ||
784 image->sec[i].offset == PAGING_SEPARATOR_SECTION) {
034846cf
EH		 785 IWL_DEBUG_FW(trans,
786 "Break since Data not valid or Empty section, sec = %d\n",
787 i);
189fa2fa 788 break;
034846cf
EH		 789 }
790
189fa2fa
EH		 791 ret = iwl_pcie_load_section(trans, i, &image->sec[i]);
792 if (ret)
793 return ret;
dcab8ecd
EH		 794
795 /* Notify the ucode of the loaded section number and status */
796 val = iwl_read_direct32(trans, FH_UCODE_LOAD_STATUS);
797 val = val | (sec_num << shift_param);
798 iwl_write_direct32(trans, FH_UCODE_LOAD_STATUS, val);
799 sec_num = (sec_num << 1) | 0x1;
e2d6f4e7
EH		 800 }
801
034846cf
EH		 802 *first_ucode_section = last_read_idx;
803
afb88917
EH		 804 if (cpu == 1)
805 iwl_write_direct32(trans, FH_UCODE_LOAD_STATUS, 0xFFFF);
806 else
807 iwl_write_direct32(trans, FH_UCODE_LOAD_STATUS, 0xFFFFFFFF);
808
189fa2fa
EH		 809 return 0;
810}
e2d6f4e7 811
189fa2fa
EH		 812static int iwl_pcie_load_cpu_sections(struct iwl_trans *trans,
813 const struct fw_img *image,
034846cf
EH		 814 int cpu,
815 int *first_ucode_section)
189fa2fa
EH		 816{
817 int shift_param;
189fa2fa 818 int i, ret = 0;
034846cf 819 u32 last_read_idx = 0;
189fa2fa
EH		 820
821 if (cpu == 1) {
822 shift_param = 0;
034846cf 823 *first_ucode_section = 0;
189fa2fa
EH		 824 } else {
825 shift_param = 16;
034846cf 826 (*first_ucode_section)++;
189fa2fa
EH		 827 }
828
034846cf
EH		 829 for (i = *first_ucode_section; i < IWL_UCODE_SECTION_MAX; i++) {
830 last_read_idx = i;
831
a6c4fb44
MG		 832 /*
833 * CPU1_CPU2_SEPARATOR_SECTION delimiter - separate between
834 * CPU1 to CPU2.
835 * PAGING_SEPARATOR_SECTION delimiter - separate between
836 * CPU2 non paged to CPU2 paging sec.
837 */
034846cf 838 if (!image->sec[i].data ||
a6c4fb44
MG		 839 image->sec[i].offset == CPU1_CPU2_SEPARATOR_SECTION ||
840 image->sec[i].offset == PAGING_SEPARATOR_SECTION) {
034846cf
EH		 841 IWL_DEBUG_FW(trans,
842 "Break since Data not valid or Empty section, sec = %d\n",
843 i);
189fa2fa 844 break;
034846cf
EH		 845 }
846
189fa2fa
EH		 847 ret = iwl_pcie_load_section(trans, i, &image->sec[i]);
848 if (ret)
849 return ret;
e2d6f4e7
EH		 850 }
851
189fa2fa
EH		 852 if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000)
853 iwl_set_bits_prph(trans,
854 CSR_UCODE_LOAD_STATUS_ADDR,
855 (LMPM_CPU_UCODE_LOADING_COMPLETED |
856 LMPM_CPU_HDRS_LOADING_COMPLETED |
857 LMPM_CPU_UCODE_LOADING_STARTED) <<
858 shift_param);
859
034846cf
EH		 860 *first_ucode_section = last_read_idx;
861
e2d6f4e7
EH		 862 return 0;
863}
864
09e350f7
LK		 865static void iwl_pcie_apply_destination(struct iwl_trans *trans)
866{
867 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
868 const struct iwl_fw_dbg_dest_tlv *dest = trans->dbg_dest_tlv;
869 int i;
870
871 if (dest->version)
872 IWL_ERR(trans,
873 "DBG DEST version is %d - expect issues\n",
874 dest->version);
875
876 IWL_INFO(trans, "Applying debug destination %s\n",
877 get_fw_dbg_mode_string(dest->monitor_mode));
878
879 if (dest->monitor_mode == EXTERNAL_MODE)
96c285da 880 iwl_pcie_alloc_fw_monitor(trans, dest->size_power);
09e350f7
LK		 881 else
882 IWL_WARN(trans, "PCI should have external buffer debug\n");
883
884 for (i = 0; i < trans->dbg_dest_reg_num; i++) {
885 u32 addr = le32_to_cpu(dest->reg_ops[i].addr);
886 u32 val = le32_to_cpu(dest->reg_ops[i].val);
887
888 switch (dest->reg_ops[i].op) {
889 case CSR_ASSIGN:
890 iwl_write32(trans, addr, val);
891 break;
892 case CSR_SETBIT:
893 iwl_set_bit(trans, addr, BIT(val));
894 break;
895 case CSR_CLEARBIT:
896 iwl_clear_bit(trans, addr, BIT(val));
897 break;
898 case PRPH_ASSIGN:
899 iwl_write_prph(trans, addr, val);
900 break;
901 case PRPH_SETBIT:
902 iwl_set_bits_prph(trans, addr, BIT(val));
903 break;
904 case PRPH_CLEARBIT:
905 iwl_clear_bits_prph(trans, addr, BIT(val));
906 break;
869f3b15
HD		 907 case PRPH_BLOCKBIT:
908 if (iwl_read_prph(trans, addr) & BIT(val)) {
909 IWL_ERR(trans,
910 "BIT(%u) in address 0x%x is 1, stopping FW configuration\n",
911 val, addr);
912 goto monitor;
913 }
914 break;
09e350f7
LK		 915 default:
916 IWL_ERR(trans, "FW debug - unknown OP %d\n",
917 dest->reg_ops[i].op);
918 break;
919 }
920 }
921
869f3b15 922monitor:
09e350f7
LK		 923 if (dest->monitor_mode == EXTERNAL_MODE && trans_pcie->fw_mon_size) {
924 iwl_write_prph(trans, le32_to_cpu(dest->base_reg),
925 trans_pcie->fw_mon_phys >> dest->base_shift);
62d7476d
EG		 926 if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000)
927 iwl_write_prph(trans, le32_to_cpu(dest->end_reg),
928 (trans_pcie->fw_mon_phys +
929 trans_pcie->fw_mon_size - 256) >>
930 dest->end_shift);
931 else
932 iwl_write_prph(trans, le32_to_cpu(dest->end_reg),
933 (trans_pcie->fw_mon_phys +
934 trans_pcie->fw_mon_size) >>
935 dest->end_shift);
09e350f7
LK		 936 }
937}
938
7afe3705 939static int iwl_pcie_load_given_ucode(struct iwl_trans *trans,
0692fe41 940 const struct fw_img *image)
cf614297 941{
c2d20201 942 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
189fa2fa 943 int ret = 0;
034846cf 944 int first_ucode_section;
cf614297 945
dcab8ecd 946 IWL_DEBUG_FW(trans, "working with %s CPU\n",
e2d6f4e7
EH		 947 image->is_dual_cpus ? "Dual" : "Single");
948
dcab8ecd
EH		 949 /* load to FW the binary non secured sections of CPU1 */
950 ret = iwl_pcie_load_cpu_sections(trans, image, 1, &first_ucode_section);
951 if (ret)
952 return ret;
e2d6f4e7
EH		 953
954 if (image->is_dual_cpus) {
189fa2fa
EH		 955 /* set CPU2 header address */
956 iwl_write_prph(trans,
957 LMPM_SECURE_UCODE_LOAD_CPU2_HDR_ADDR,
958 LMPM_SECURE_CPU2_HDR_MEM_SPACE);
e2d6f4e7 959
189fa2fa 960 /* load to FW the binary sections of CPU2 */
dcab8ecd
EH		 961 ret = iwl_pcie_load_cpu_sections(trans, image, 2,
962 &first_ucode_section);
189fa2fa
EH		 963 if (ret)
964 return ret;
e2d6f4e7 965 }
cf614297 966
c2d20201
EG		 967 /* supported for 7000 only for the moment */
968 if (iwlwifi_mod_params.fw_monitor &&
969 trans->cfg->device_family == IWL_DEVICE_FAMILY_7000) {
96c285da 970 iwl_pcie_alloc_fw_monitor(trans, 0);
c2d20201
EG		 971
972 if (trans_pcie->fw_mon_size) {
973 iwl_write_prph(trans, MON_BUFF_BASE_ADDR,
974 trans_pcie->fw_mon_phys >> 4);
975 iwl_write_prph(trans, MON_BUFF_END_ADDR,
976 (trans_pcie->fw_mon_phys +
977 trans_pcie->fw_mon_size) >> 4);
978 }
09e350f7
LK		 979 } else if (trans->dbg_dest_tlv) {
980 iwl_pcie_apply_destination(trans);
c2d20201
EG		 981 }
982
e12ba844 983 /* release CPU reset */
5dd9c68a 984 iwl_write32(trans, CSR_RESET, 0);
e12ba844 985
dcab8ecd
EH		 986 return 0;
987}
189fa2fa 988
5dd9c68a
EG		 989static int iwl_pcie_load_given_ucode_8000(struct iwl_trans *trans,
990 const struct fw_img *image)
dcab8ecd
EH		 991{
992 int ret = 0;
993 int first_ucode_section;
dcab8ecd
EH		 994
995 IWL_DEBUG_FW(trans, "working with %s CPU\n",
996 image->is_dual_cpus ? "Dual" : "Single");
997
a2227ce2
EG		 998 if (trans->dbg_dest_tlv)
999 iwl_pcie_apply_destination(trans);
1000
16bc119b
EH		 1001 /* TODO: remove in the next Si step */
1002 ret = iwl_pcie_rsa_race_bug_wa(trans);
1003 if (ret)
1004 return ret;
1005
dcab8ecd
EH		 1006 /* configure the ucode to be ready to get the secured image */
1007 /* release CPU reset */
1008 iwl_write_prph(trans, RELEASE_CPU_RESET, RELEASE_CPU_RESET_BIT);
1009
1010 /* load to FW the binary Secured sections of CPU1 */
5dd9c68a
EG		 1011 ret = iwl_pcie_load_cpu_sections_8000(trans, image, 1,
1012 &first_ucode_section);
dcab8ecd
EH		 1013 if (ret)
1014 return ret;
1015
1016 /* load to FW the binary sections of CPU2 */
47dbab26
EG		 1017 return iwl_pcie_load_cpu_sections_8000(trans, image, 2,
1018 &first_ucode_section);
cf614297
EG		 1019}
1020
fa9f3281 1021static void _iwl_trans_pcie_stop_device(struct iwl_trans *trans, bool low_power)
ae2c30bf 1022{
43e58856 1023 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
3dc3374f
EG		 1024 bool hw_rfkill, was_hw_rfkill;
1025
fa9f3281
EG		 1026 lockdep_assert_held(&trans_pcie->mutex);
1027
1028 if (trans_pcie->is_down)
1029 return;
1030
1031 trans_pcie->is_down = true;
1032
3dc3374f 1033 was_hw_rfkill = iwl_is_rfkill_set(trans);
ae2c30bf 1034
43e58856 1035 /* tell the device to stop sending interrupts */
7b70bd63 1036 spin_lock(&trans_pcie->irq_lock);
ae2c30bf 1037 iwl_disable_interrupts(trans);
7b70bd63 1038 spin_unlock(&trans_pcie->irq_lock);
ae2c30bf 1039
ab6cf8e8 1040 /* device going down, Stop using ICT table */
990aa6d7 1041 iwl_pcie_disable_ict(trans);
ab6cf8e8
EG		 1042
1043 /*
1044 * If a HW restart happens during firmware loading,
1045 * then the firmware loading might call this function
1046 * and later it might be called again due to the
1047 * restart. So don't process again if the device is
1048 * already dead.
1049 */
31b8b343 1050 if (test_and_clear_bit(STATUS_DEVICE_ENABLED, &trans->status)) {
a6bd005f
EG		 1051 IWL_DEBUG_INFO(trans,
1052 "DEVICE_ENABLED bit was set and is now cleared\n");
f02831be 1053 iwl_pcie_tx_stop(trans);
9805c446 1054 iwl_pcie_rx_stop(trans);
6379103e 1055
ab6cf8e8 1056 /* Power-down device's busmaster DMA clocks */
95411d04 1057 if (!trans->cfg->apmg_not_supported) {
1aa02b5a
AA		 1058 iwl_write_prph(trans, APMG_CLK_DIS_REG,
1059 APMG_CLK_VAL_DMA_CLK_RQT);
1060 udelay(5);
1061 }
ab6cf8e8
EG		 1062 }
1063
1064 /* Make sure (redundant) we've released our request to stay awake */
1042db2a 1065 iwl_clear_bit(trans, CSR_GP_CNTRL,
20d3b647 1066 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
ab6cf8e8
EG		 1067
1068 /* Stop the device, and put it in low power state */
b7aaeae4 1069 iwl_pcie_apm_stop(trans, false);
43e58856 1070
03d6c3b0
EG		 1071 /* stop and reset the on-board processor */
1072 iwl_write32(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
b7a08b28 1073 usleep_range(1000, 2000);
03d6c3b0
EG		 1074
1075 /*
1076 * Upon stop, the APM issues an interrupt if HW RF kill is set.
1077 * This is a bug in certain verions of the hardware.
1078 * Certain devices also keep sending HW RF kill interrupt all
1079 * the time, unless the interrupt is ACKed even if the interrupt
1080 * should be masked. Re-ACK all the interrupts here.
43e58856 1081 */
7b70bd63 1082 spin_lock(&trans_pcie->irq_lock);
43e58856 1083 iwl_disable_interrupts(trans);
7b70bd63 1084 spin_unlock(&trans_pcie->irq_lock);
43e58856 1085
74fda971 1086 /* clear all status bits */
eb7ff77e
AN		 1087 clear_bit(STATUS_SYNC_HCMD_ACTIVE, &trans->status);
1088 clear_bit(STATUS_INT_ENABLED, &trans->status);
eb7ff77e
AN		 1089 clear_bit(STATUS_TPOWER_PMI, &trans->status);
1090 clear_bit(STATUS_RFKILL, &trans->status);
a4082843
AN		 1091
1092 /*
1093 * Even if we stop the HW, we still want the RF kill
1094 * interrupt
1095 */
1096 iwl_enable_rfkill_int(trans);
1097
1098 /*
1099 * Check again since the RF kill state may have changed while
1100 * all the interrupts were disabled, in this case we couldn't
1101 * receive the RF kill interrupt and update the state in the
1102 * op_mode.
3dc3374f
EG		 1103 * Don't call the op_mode if the rkfill state hasn't changed.
1104 * This allows the op_mode to call stop_device from the rfkill
1105 * notification without endless recursion. Under very rare
1106 * circumstances, we might have a small recursion if the rfkill
1107 * state changed exactly now while we were called from stop_device.
1108 * This is very unlikely but can happen and is supported.
a4082843
AN		 1109 */
1110 hw_rfkill = iwl_is_rfkill_set(trans);
1111 if (hw_rfkill)
eb7ff77e 1112 set_bit(STATUS_RFKILL, &trans->status);
a4082843 1113 else
eb7ff77e 1114 clear_bit(STATUS_RFKILL, &trans->status);
3dc3374f 1115 if (hw_rfkill != was_hw_rfkill)
14cfca71 1116 iwl_trans_pcie_rf_kill(trans, hw_rfkill);
655e5cf0 1117
a6bd005f 1118 /* re-take ownership to prevent other users from stealing the device */
655e5cf0 1119 iwl_pcie_prepare_card_hw(trans);
14cfca71
JB		 1120}
1121
2e5d4a8f
HD		 1122static void iwl_pcie_synchronize_irqs(struct iwl_trans *trans)
1123{
1124 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1125
1126 if (trans_pcie->msix_enabled) {
1127 int i;
1128
1129 for (i = 0; i < trans_pcie->allocated_vector; i++)
1130 synchronize_irq(trans_pcie->msix_entries[i].vector);
1131 } else {
1132 synchronize_irq(trans_pcie->pci_dev->irq);
1133 }
1134}
1135
a6bd005f
EG		 1136static int iwl_trans_pcie_start_fw(struct iwl_trans *trans,
1137 const struct fw_img *fw, bool run_in_rfkill)
1138{
1139 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1140 bool hw_rfkill;
1141 int ret;
1142
1143 /* This may fail if AMT took ownership of the device */
1144 if (iwl_pcie_prepare_card_hw(trans)) {
1145 IWL_WARN(trans, "Exit HW not ready\n");
1146 ret = -EIO;
1147 goto out;
1148 }
1149
1150 iwl_enable_rfkill_int(trans);
1151
1152 iwl_write32(trans, CSR_INT, 0xFFFFFFFF);
1153
1154 /*
1155 * We enabled the RF-Kill interrupt and the handler may very
1156 * well be running. Disable the interrupts to make sure no other
1157 * interrupt can be fired.
1158 */
1159 iwl_disable_interrupts(trans);
1160
1161 /* Make sure it finished running */
2e5d4a8f 1162 iwl_pcie_synchronize_irqs(trans);
a6bd005f
EG		 1163
1164 mutex_lock(&trans_pcie->mutex);
1165
1166 /* If platform's RF_KILL switch is NOT set to KILL */
1167 hw_rfkill = iwl_is_rfkill_set(trans);
1168 if (hw_rfkill)
1169 set_bit(STATUS_RFKILL, &trans->status);
1170 else
1171 clear_bit(STATUS_RFKILL, &trans->status);
1172 iwl_trans_pcie_rf_kill(trans, hw_rfkill);
1173 if (hw_rfkill && !run_in_rfkill) {
1174 ret = -ERFKILL;
1175 goto out;
1176 }
1177
1178 /* Someone called stop_device, don't try to start_fw */
1179 if (trans_pcie->is_down) {
1180 IWL_WARN(trans,
1181 "Can't start_fw since the HW hasn't been started\n");
20aa99bb 1182 ret = -EIO;
a6bd005f
EG		 1183 goto out;
1184 }
1185
1186 /* make sure rfkill handshake bits are cleared */
1187 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1188 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR,
1189 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1190
1191 /* clear (again), then enable host interrupts */
1192 iwl_write32(trans, CSR_INT, 0xFFFFFFFF);
1193
1194 ret = iwl_pcie_nic_init(trans);
1195 if (ret) {
1196 IWL_ERR(trans, "Unable to init nic\n");
1197 goto out;
1198 }
1199
1200 /*
1201 * Now, we load the firmware and don't want to be interrupted, even
1202 * by the RF-Kill interrupt (hence mask all the interrupt besides the
1203 * FH_TX interrupt which is needed to load the firmware). If the
1204 * RF-Kill switch is toggled, we will find out after having loaded
1205 * the firmware and return the proper value to the caller.
1206 */
1207 iwl_enable_fw_load_int(trans);
1208
1209 /* really make sure rfkill handshake bits are cleared */
1210 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1211 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1212
1213 /* Load the given image to the HW */
1214 if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000)
1215 ret = iwl_pcie_load_given_ucode_8000(trans, fw);
1216 else
1217 ret = iwl_pcie_load_given_ucode(trans, fw);
1218 iwl_enable_interrupts(trans);
1219
1220 /* re-check RF-Kill state since we may have missed the interrupt */
1221 hw_rfkill = iwl_is_rfkill_set(trans);
1222 if (hw_rfkill)
1223 set_bit(STATUS_RFKILL, &trans->status);
1224 else
1225 clear_bit(STATUS_RFKILL, &trans->status);
1226
1227 iwl_trans_pcie_rf_kill(trans, hw_rfkill);
1228 if (hw_rfkill && !run_in_rfkill)
1229 ret = -ERFKILL;
1230
1231out:
1232 mutex_unlock(&trans_pcie->mutex);
1233 return ret;
1234}
1235
1236static void iwl_trans_pcie_fw_alive(struct iwl_trans *trans, u32 scd_addr)
1237{
1238 iwl_pcie_reset_ict(trans);
1239 iwl_pcie_tx_start(trans, scd_addr);
1240}
1241
fa9f3281
EG		 1242static void iwl_trans_pcie_stop_device(struct iwl_trans *trans, bool low_power)
1243{
1244 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1245
1246 mutex_lock(&trans_pcie->mutex);
1247 _iwl_trans_pcie_stop_device(trans, low_power);
1248 mutex_unlock(&trans_pcie->mutex);
1249}
1250
14cfca71
JB		 1251void iwl_trans_pcie_rf_kill(struct iwl_trans *trans, bool state)
1252{
fa9f3281
EG		 1253 struct iwl_trans_pcie __maybe_unused *trans_pcie =
1254 IWL_TRANS_GET_PCIE_TRANS(trans);
1255
1256 lockdep_assert_held(&trans_pcie->mutex);
1257
14cfca71 1258 if (iwl_op_mode_hw_rf_kill(trans->op_mode, state))
fa9f3281 1259 _iwl_trans_pcie_stop_device(trans, true);
ab6cf8e8
EG		 1260}
1261
23ae6128
MG		 1262static void iwl_trans_pcie_d3_suspend(struct iwl_trans *trans, bool test,
1263 bool reset)
2dd4f9f7 1264{
23ae6128 1265 if (!reset) {
6dfb36c8
EP		 1266 /* Enable persistence mode to avoid reset */
1267 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
1268 CSR_HW_IF_CONFIG_REG_PERSIST_MODE);
1269 }
1270
2dd4f9f7 1271 iwl_disable_interrupts(trans);
debff618
JB		 1272
1273 /*
1274 * in testing mode, the host stays awake and the
1275 * hardware won't be reset (not even partially)
1276 */
1277 if (test)
1278 return;
1279
ddaf5a5b
JB		 1280 iwl_pcie_disable_ict(trans);
1281
2e5d4a8f 1282 iwl_pcie_synchronize_irqs(trans);
33b56af1 1283
2dd4f9f7
JB		 1284 iwl_clear_bit(trans, CSR_GP_CNTRL,
1285 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
ddaf5a5b
JB		 1286 iwl_clear_bit(trans, CSR_GP_CNTRL,
1287 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1288
1316d595
SS		 1289 iwl_pcie_enable_rx_wake(trans, false);
1290
23ae6128 1291 if (reset) {
6dfb36c8
EP		 1292 /*
1293 * reset TX queues -- some of their registers reset during S3
1294 * so if we don't reset everything here the D3 image would try
1295 * to execute some invalid memory upon resume
1296 */
1297 iwl_trans_pcie_tx_reset(trans);
1298 }
ddaf5a5b
JB		 1299
1300 iwl_pcie_set_pwr(trans, true);
1301}
1302
1303static int iwl_trans_pcie_d3_resume(struct iwl_trans *trans,
debff618 1304 enum iwl_d3_status *status,
23ae6128 1305 bool test, bool reset)
ddaf5a5b
JB		 1306{
1307 u32 val;
1308 int ret;
1309
debff618
JB		 1310 if (test) {
1311 iwl_enable_interrupts(trans);
1312 *status = IWL_D3_STATUS_ALIVE;
1313 return 0;
1314 }
1315
1316d595
SS		 1316 iwl_pcie_enable_rx_wake(trans, true);
1317
ddaf5a5b
JB		 1318 /*
1319 * Also enables interrupts - none will happen as the device doesn't
1320 * know we're waking it up, only when the opmode actually tells it
1321 * after this call.
1322 */
1323 iwl_pcie_reset_ict(trans);
18dcb9a9 1324 iwl_enable_interrupts(trans);
ddaf5a5b
JB		 1325
1326 iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1327 iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1328
01e58a28
EG		 1329 if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000)
1330 udelay(2);
1331
ddaf5a5b
JB		 1332 ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
1333 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1334 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1335 25000);
7f2ac8fb 1336 if (ret < 0) {
ddaf5a5b
JB		 1337 IWL_ERR(trans, "Failed to resume the device (mac ready)\n");
1338 return ret;
1339 }
1340
a3ead656
EG		 1341 iwl_pcie_set_pwr(trans, false);
1342
23ae6128 1343 if (!reset) {
6dfb36c8
EP		 1344 iwl_clear_bit(trans, CSR_GP_CNTRL,
1345 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1346 } else {
1347 iwl_trans_pcie_tx_reset(trans);
ddaf5a5b 1348
6dfb36c8
EP		 1349 ret = iwl_pcie_rx_init(trans);
1350 if (ret) {
1351 IWL_ERR(trans,
1352 "Failed to resume the device (RX reset)\n");
1353 return ret;
1354 }
ddaf5a5b
JB		 1355 }
1356
a3ead656
EG		 1357 val = iwl_read32(trans, CSR_RESET);
1358 if (val & CSR_RESET_REG_FLAG_NEVO_RESET)
1359 *status = IWL_D3_STATUS_RESET;
1360 else
1361 *status = IWL_D3_STATUS_ALIVE;
1362
ddaf5a5b 1363 return 0;
2dd4f9f7
JB		 1364}
1365
2e5d4a8f
HD		 1366struct iwl_causes_list {
1367 u32 cause_num;
1368 u32 mask_reg;
1369 u8 addr;
1370};
1371
1372static struct iwl_causes_list causes_list[] = {
1373 {MSIX_FH_INT_CAUSES_D2S_CH0_NUM, CSR_MSIX_FH_INT_MASK_AD, 0},
1374 {MSIX_FH_INT_CAUSES_D2S_CH1_NUM, CSR_MSIX_FH_INT_MASK_AD, 0x1},
1375 {MSIX_FH_INT_CAUSES_S2D, CSR_MSIX_FH_INT_MASK_AD, 0x3},
1376 {MSIX_FH_INT_CAUSES_FH_ERR, CSR_MSIX_FH_INT_MASK_AD, 0x5},
1377 {MSIX_HW_INT_CAUSES_REG_ALIVE, CSR_MSIX_HW_INT_MASK_AD, 0x10},
1378 {MSIX_HW_INT_CAUSES_REG_WAKEUP, CSR_MSIX_HW_INT_MASK_AD, 0x11},
1379 {MSIX_HW_INT_CAUSES_REG_CT_KILL, CSR_MSIX_HW_INT_MASK_AD, 0x16},
1380 {MSIX_HW_INT_CAUSES_REG_RF_KILL, CSR_MSIX_HW_INT_MASK_AD, 0x17},
1381 {MSIX_HW_INT_CAUSES_REG_PERIODIC, CSR_MSIX_HW_INT_MASK_AD, 0x18},
1382 {MSIX_HW_INT_CAUSES_REG_SW_ERR, CSR_MSIX_HW_INT_MASK_AD, 0x29},
1383 {MSIX_HW_INT_CAUSES_REG_SCD, CSR_MSIX_HW_INT_MASK_AD, 0x2A},
1384 {MSIX_HW_INT_CAUSES_REG_FH_TX, CSR_MSIX_HW_INT_MASK_AD, 0x2B},
1385 {MSIX_HW_INT_CAUSES_REG_HW_ERR, CSR_MSIX_HW_INT_MASK_AD, 0x2D},
1386 {MSIX_HW_INT_CAUSES_REG_HAP, CSR_MSIX_HW_INT_MASK_AD, 0x2E},
1387};
1388
1389static void iwl_pcie_init_msix(struct iwl_trans_pcie *trans_pcie)
1390{
1391 u32 val, max_rx_vector, i;
1392 struct iwl_trans *trans = trans_pcie->trans;
1393
1394 max_rx_vector = trans_pcie->allocated_vector - 1;
1395
1396 if (!trans_pcie->msix_enabled)
1397 return;
1398
1399 iwl_write_prph(trans, UREG_CHICK, UREG_CHICK_MSIX_ENABLE);
1400
1401 /*
1402 * Each cause from the list above and the RX causes is represented as
1403 * a byte in the IVAR table. We access the first (N - 1) bytes and map
1404 * them to the (N - 1) vectors so these vectors will be used as rx
1405 * vectors. Then access all non rx causes and map them to the
1406 * default queue (N'th queue).
1407 */
1408 for (i = 0; i < max_rx_vector; i++) {
1409 iwl_write8(trans, CSR_MSIX_RX_IVAR(i), MSIX_FH_INT_CAUSES_Q(i));
1410 iwl_clear_bit(trans, CSR_MSIX_FH_INT_MASK_AD,
1411 BIT(MSIX_FH_INT_CAUSES_Q(i)));
1412 }
1413
1414 for (i = 0; i < ARRAY_SIZE(causes_list); i++) {
1415 val = trans_pcie->default_irq_num |
1416 MSIX_NON_AUTO_CLEAR_CAUSE;
1417 iwl_write8(trans, CSR_MSIX_IVAR(causes_list[i].addr), val);
1418 iwl_clear_bit(trans, causes_list[i].mask_reg,
1419 causes_list[i].cause_num);
1420 }
1421 trans_pcie->fh_init_mask =
1422 ~iwl_read32(trans, CSR_MSIX_FH_INT_MASK_AD);
1423 trans_pcie->fh_mask = trans_pcie->fh_init_mask;
1424 trans_pcie->hw_init_mask =
1425 ~iwl_read32(trans, CSR_MSIX_HW_INT_MASK_AD);
1426 trans_pcie->hw_mask = trans_pcie->hw_init_mask;
1427}
1428
1429static void iwl_pcie_set_interrupt_capa(struct pci_dev *pdev,
1430 struct iwl_trans *trans)
1431{
1432 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1433 u16 pci_cmd;
1434 int max_vector;
1435 int ret, i;
1436
1437 if (trans->cfg->mq_rx_supported) {
013a67ea 1438 max_vector = min_t(u32, (num_possible_cpus() + 2),
2e5d4a8f
HD		 1439 IWL_MAX_RX_HW_QUEUES);
1440 for (i = 0; i < max_vector; i++)
1441 trans_pcie->msix_entries[i].entry = i;
1442
1443 ret = pci_enable_msix_range(pdev, trans_pcie->msix_entries,
1444 MSIX_MIN_INTERRUPT_VECTORS,
1445 max_vector);
1446 if (ret > 1) {
1447 IWL_DEBUG_INFO(trans,
1448 "Enable MSI-X allocate %d interrupt vector\n",
1449 ret);
1450 trans_pcie->allocated_vector = ret;
1451 trans_pcie->default_irq_num =
1452 trans_pcie->allocated_vector - 1;
1453 trans_pcie->trans->num_rx_queues =
1454 trans_pcie->allocated_vector - 1;
1455 trans_pcie->msix_enabled = true;
1456
1457 return;
1458 }
1459 IWL_DEBUG_INFO(trans,
1460 "ret = %d %s move to msi mode\n", ret,
1461 (ret == 1) ?
1462 "can't allocate more than 1 interrupt vector" :
1463 "failed to enable msi-x mode");
1464 pci_disable_msix(pdev);
1465 }
1466
1467 ret = pci_enable_msi(pdev);
1468 if (ret) {
6ed5e4d6 1469 dev_err(&pdev->dev, "pci_enable_msi failed - %d\n", ret);
2e5d4a8f
HD		 1470 /* enable rfkill interrupt: hw bug w/a */
1471 pci_read_config_word(pdev, PCI_COMMAND, &pci_cmd);
1472 if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
1473 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
1474 pci_write_config_word(pdev, PCI_COMMAND, pci_cmd);
1475 }
1476 }
1477}
1478
1479static int iwl_pcie_init_msix_handler(struct pci_dev *pdev,
1480 struct iwl_trans_pcie *trans_pcie)
1481{
1482 int i, last_vector;
1483
1484 last_vector = trans_pcie->trans->num_rx_queues;
1485
1486 for (i = 0; i < trans_pcie->allocated_vector; i++) {
1487 int ret;
1488
1489 ret = request_threaded_irq(trans_pcie->msix_entries[i].vector,
1490 iwl_pcie_msix_isr,
1491 (i == last_vector) ?
1492 iwl_pcie_irq_msix_handler :
1493 iwl_pcie_irq_rx_msix_handler,
1494 IRQF_SHARED,
1495 DRV_NAME,
1496 &trans_pcie->msix_entries[i]);
1497 if (ret) {
1498 int j;
1499
1500 IWL_ERR(trans_pcie->trans,
1501 "Error allocating IRQ %d\n", i);
1502 for (j = 0; j < i; j++)
8d80717a
HD		 1503 free_irq(trans_pcie->msix_entries[j].vector,
1504 &trans_pcie->msix_entries[j]);
2e5d4a8f
HD		 1505 pci_disable_msix(pdev);
1506 return ret;
1507 }
1508 }
1509
1510 return 0;
1511}
1512
fa9f3281 1513static int _iwl_trans_pcie_start_hw(struct iwl_trans *trans, bool low_power)
e6bb4c9c 1514{
fa9f3281 1515 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
c9eec95c 1516 bool hw_rfkill;
a8b691e6 1517 int err;
e6bb4c9c 1518
fa9f3281
EG		 1519 lockdep_assert_held(&trans_pcie->mutex);
1520
7afe3705 1521 err = iwl_pcie_prepare_card_hw(trans);
ebb7678d 1522 if (err) {
d6f1c316 1523 IWL_ERR(trans, "Error while preparing HW: %d\n", err);
a8b691e6 1524 return err;
ebb7678d 1525 }
a6c684ee 1526
2997494f 1527 /* Reset the entire device */
ce836c76 1528 iwl_write32(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
b7a08b28 1529 usleep_range(1000, 2000);
2997494f 1530
7afe3705 1531 iwl_pcie_apm_init(trans);
a6c684ee 1532
2e5d4a8f 1533 iwl_pcie_init_msix(trans_pcie);
226c02ca
EG		 1534 /* From now on, the op_mode will be kept updated about RF kill state */
1535 iwl_enable_rfkill_int(trans);
1536
fa9f3281
EG		 1537 /* Set is_down to false here so that...*/
1538 trans_pcie->is_down = false;
1539
8d425517 1540 hw_rfkill = iwl_is_rfkill_set(trans);
4620020b 1541 if (hw_rfkill)
eb7ff77e 1542 set_bit(STATUS_RFKILL, &trans->status);
4620020b 1543 else
eb7ff77e 1544 clear_bit(STATUS_RFKILL, &trans->status);
fa9f3281 1545 /* ... rfkill can call stop_device and set it false if needed */
14cfca71 1546 iwl_trans_pcie_rf_kill(trans, hw_rfkill);
d48e2074 1547
4cbb8e50
LC		 1548 /* Make sure we sync here, because we'll need full access later */
1549 if (low_power)
1550 pm_runtime_resume(trans->dev);
1551
a8b691e6 1552 return 0;
e6bb4c9c
EG		 1553}
1554
fa9f3281
EG		 1555static int iwl_trans_pcie_start_hw(struct iwl_trans *trans, bool low_power)
1556{
1557 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1558 int ret;
1559
1560 mutex_lock(&trans_pcie->mutex);
1561 ret = _iwl_trans_pcie_start_hw(trans, low_power);
1562 mutex_unlock(&trans_pcie->mutex);
1563
1564 return ret;
1565}
1566
a4082843 1567static void iwl_trans_pcie_op_mode_leave(struct iwl_trans *trans)
cc56feb2 1568{
20d3b647 1569 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
d23f78e6 1570
fa9f3281
EG		 1571 mutex_lock(&trans_pcie->mutex);
1572
a4082843 1573 /* disable interrupts - don't enable HW RF kill interrupt */
7b70bd63 1574 spin_lock(&trans_pcie->irq_lock);
ee7d737c 1575 iwl_disable_interrupts(trans);
7b70bd63 1576 spin_unlock(&trans_pcie->irq_lock);
ee7d737c 1577
b7aaeae4 1578 iwl_pcie_apm_stop(trans, true);
cc56feb2 1579
7b70bd63 1580 spin_lock(&trans_pcie->irq_lock);
218733cf 1581 iwl_disable_interrupts(trans);
7b70bd63 1582 spin_unlock(&trans_pcie->irq_lock);
1df06bdc 1583
8d96bb61 1584 iwl_pcie_disable_ict(trans);
33b56af1 1585
fa9f3281 1586 mutex_unlock(&trans_pcie->mutex);
33b56af1 1587
2e5d4a8f 1588 iwl_pcie_synchronize_irqs(trans);
cc56feb2
EG		 1589}
1590
03905495
EG		 1591static void iwl_trans_pcie_write8(struct iwl_trans *trans, u32 ofs, u8 val)
1592{
05f5b97e 1593 writeb(val, IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs);
03905495
EG		 1594}
1595
1596static void iwl_trans_pcie_write32(struct iwl_trans *trans, u32 ofs, u32 val)
1597{
05f5b97e 1598 writel(val, IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs);
03905495
EG		 1599}
1600
1601static u32 iwl_trans_pcie_read32(struct iwl_trans *trans, u32 ofs)
1602{
05f5b97e 1603 return readl(IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs);
03905495
EG		 1604}
1605
6a06b6c1
EG		 1606static u32 iwl_trans_pcie_read_prph(struct iwl_trans *trans, u32 reg)
1607{
f9477c17
AP		 1608 iwl_trans_pcie_write32(trans, HBUS_TARG_PRPH_RADDR,
1609 ((reg & 0x000FFFFF) | (3 << 24)));
6a06b6c1
EG		 1610 return iwl_trans_pcie_read32(trans, HBUS_TARG_PRPH_RDAT);
1611}
1612
1613static void iwl_trans_pcie_write_prph(struct iwl_trans *trans, u32 addr,
1614 u32 val)
1615{
1616 iwl_trans_pcie_write32(trans, HBUS_TARG_PRPH_WADDR,
f9477c17 1617 ((addr & 0x000FFFFF) | (3 << 24)));
6a06b6c1
EG		 1618 iwl_trans_pcie_write32(trans, HBUS_TARG_PRPH_WDAT, val);
1619}
1620
c6f600fc 1621static void iwl_trans_pcie_configure(struct iwl_trans *trans,
9eae88fa 1622 const struct iwl_trans_config *trans_cfg)
c6f600fc
MV		 1623{
1624 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1625
1626 trans_pcie->cmd_queue = trans_cfg->cmd_queue;
b04db9ac 1627 trans_pcie->cmd_fifo = trans_cfg->cmd_fifo;
4cf677fd 1628 trans_pcie->cmd_q_wdg_timeout = trans_cfg->cmd_q_wdg_timeout;
d663ee73
JB		 1629 if (WARN_ON(trans_cfg->n_no_reclaim_cmds > MAX_NO_RECLAIM_CMDS))
1630 trans_pcie->n_no_reclaim_cmds = 0;
1631 else
1632 trans_pcie->n_no_reclaim_cmds = trans_cfg->n_no_reclaim_cmds;
1633 if (trans_pcie->n_no_reclaim_cmds)
1634 memcpy(trans_pcie->no_reclaim_cmds, trans_cfg->no_reclaim_cmds,
1635 trans_pcie->n_no_reclaim_cmds * sizeof(u8));
9eae88fa 1636
6c4fbcbc
EG		 1637 trans_pcie->rx_buf_size = trans_cfg->rx_buf_size;
1638 trans_pcie->rx_page_order =
1639 iwl_trans_get_rb_size_order(trans_pcie->rx_buf_size);
7c5ba4a8 1640
ab02165c 1641 trans_pcie->wide_cmd_header = trans_cfg->wide_cmd_header;
046db346 1642 trans_pcie->bc_table_dword = trans_cfg->bc_table_dword;
3a736bcb 1643 trans_pcie->scd_set_active = trans_cfg->scd_set_active;
41837ca9 1644 trans_pcie->sw_csum_tx = trans_cfg->sw_csum_tx;
f14d6b39 1645
39bdb17e
SD		 1646 trans->command_groups = trans_cfg->command_groups;
1647 trans->command_groups_size = trans_cfg->command_groups_size;
1648
f14d6b39
JB		 1649 /* Initialize NAPI here - it should be before registering to mac80211
1650 * in the opmode but after the HW struct is allocated.
1651 * As this function may be called again in some corner cases don't
1652 * do anything if NAPI was already initialized.
1653 */
bce97731 1654 if (trans_pcie->napi_dev.reg_state != NETREG_DUMMY)
f14d6b39 1655 init_dummy_netdev(&trans_pcie->napi_dev);
c6f600fc
MV		 1656}
1657
d1ff5253 1658void iwl_trans_pcie_free(struct iwl_trans *trans)
34c1b7ba 1659{
20d3b647 1660 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
6eb5e529 1661 int i;
a42a1844 1662
2e5d4a8f 1663 iwl_pcie_synchronize_irqs(trans);
0aa86df6 1664
f02831be 1665 iwl_pcie_tx_free(trans);
9805c446 1666 iwl_pcie_rx_free(trans);
6379103e 1667
2e5d4a8f
HD		 1668 if (trans_pcie->msix_enabled) {
1669 for (i = 0; i < trans_pcie->allocated_vector; i++)
1670 free_irq(trans_pcie->msix_entries[i].vector,
1671 &trans_pcie->msix_entries[i]);
1672
1673 pci_disable_msix(trans_pcie->pci_dev);
1674 trans_pcie->msix_enabled = false;
1675 } else {
1676 free_irq(trans_pcie->pci_dev->irq, trans);
a42a1844 1677
2e5d4a8f
HD		 1678 iwl_pcie_free_ict(trans);
1679
1680 pci_disable_msi(trans_pcie->pci_dev);
1681 }
05f5b97e 1682 iounmap(trans_pcie->hw_base);
a42a1844
EG		 1683 pci_release_regions(trans_pcie->pci_dev);
1684 pci_disable_device(trans_pcie->pci_dev);
1685
c2d20201
EG		 1686 iwl_pcie_free_fw_monitor(trans);
1687
6eb5e529
EG		 1688 for_each_possible_cpu(i) {
1689 struct iwl_tso_hdr_page *p =
1690 per_cpu_ptr(trans_pcie->tso_hdr_page, i);
1691
1692 if (p->page)
1693 __free_page(p->page);
1694 }
1695
1696 free_percpu(trans_pcie->tso_hdr_page);
a2a57a35 1697 mutex_destroy(&trans_pcie->mutex);
7b501d10 1698 iwl_trans_free(trans);
34c1b7ba
EG		 1699}
1700
47107e84
DF		 1701static void iwl_trans_pcie_set_pmi(struct iwl_trans *trans, bool state)
1702{
47107e84 1703 if (state)
eb7ff77e 1704 set_bit(STATUS_TPOWER_PMI, &trans->status);
47107e84 1705 else
eb7ff77e 1706 clear_bit(STATUS_TPOWER_PMI, &trans->status);
47107e84
DF		 1707}
1708
23ba9340
EG		 1709static bool iwl_trans_pcie_grab_nic_access(struct iwl_trans *trans,
1710 unsigned long *flags)
7a65d170
EG		 1711{
1712 int ret;
cfb4e624
JB		 1713 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1714
1715 spin_lock_irqsave(&trans_pcie->reg_lock, *flags);
7a65d170 1716
fc8a350d 1717 if (trans_pcie->cmd_hold_nic_awake)
b9439491
EG		 1718 goto out;
1719
7a65d170 1720 /* this bit wakes up the NIC */
e139dc4a
LE		 1721 __iwl_trans_pcie_set_bit(trans, CSR_GP_CNTRL,
1722 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
01e58a28
EG		 1723 if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000)
1724 udelay(2);
7a65d170
EG		 1725
1726 /*
1727 * These bits say the device is running, and should keep running for
1728 * at least a short while (at least as long as MAC_ACCESS_REQ stays 1),
1729 * but they do not indicate that embedded SRAM is restored yet;
1730 * 3945 and 4965 have volatile SRAM, and must save/restore contents
1731 * to/from host DRAM when sleeping/waking for power-saving.
1732 * Each direction takes approximately 1/4 millisecond; with this
1733 * overhead, it's a good idea to grab and hold MAC_ACCESS_REQUEST if a
1734 * series of register accesses are expected (e.g. reading Event Log),
1735 * to keep device from sleeping.
1736 *
1737 * CSR_UCODE_DRV_GP1 register bit MAC_SLEEP == 0 indicates that
1738 * SRAM is okay/restored. We don't check that here because this call
1739 * is just for hardware register access; but GP1 MAC_SLEEP check is a
1740 * good idea before accessing 3945/4965 SRAM (e.g. reading Event Log).
1741 *
1742 * 5000 series and later (including 1000 series) have non-volatile SRAM,
1743 * and do not save/restore SRAM when power cycling.
1744 */
1745 ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
1746 CSR_GP_CNTRL_REG_VAL_MAC_ACCESS_EN,
1747 (CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY |
1748 CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP), 15000);
1749 if (unlikely(ret < 0)) {
1750 iwl_write32(trans, CSR_RESET, CSR_RESET_REG_FLAG_FORCE_NMI);
23ba9340
EG		 1751 WARN_ONCE(1,
1752 "Timeout waiting for hardware access (CSR_GP_CNTRL 0x%08x)\n",
1753 iwl_read32(trans, CSR_GP_CNTRL));
1754 spin_unlock_irqrestore(&trans_pcie->reg_lock, *flags);
1755 return false;
7a65d170
EG		 1756 }
1757
b9439491 1758out:
e56b04ef
LE		 1759 /*
1760 * Fool sparse by faking we release the lock - sparse will
1761 * track nic_access anyway.
1762 */
cfb4e624 1763 __release(&trans_pcie->reg_lock);
7a65d170
EG		 1764 return true;
1765}
1766
e56b04ef
LE		 1767static void iwl_trans_pcie_release_nic_access(struct iwl_trans *trans,
1768 unsigned long *flags)
7a65d170 1769{
cfb4e624 1770 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
e56b04ef 1771
cfb4e624 1772 lockdep_assert_held(&trans_pcie->reg_lock);
e56b04ef
LE		 1773
1774 /*
1775 * Fool sparse by faking we acquiring the lock - sparse will
1776 * track nic_access anyway.
1777 */
cfb4e624 1778 __acquire(&trans_pcie->reg_lock);
e56b04ef 1779
fc8a350d 1780 if (trans_pcie->cmd_hold_nic_awake)
b9439491
EG		 1781 goto out;
1782
e139dc4a
LE		 1783 __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL,
1784 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
7a65d170
EG		 1785 /*
1786 * Above we read the CSR_GP_CNTRL register, which will flush
1787 * any previous writes, but we need the write that clears the
1788 * MAC_ACCESS_REQ bit to be performed before any other writes
1789 * scheduled on different CPUs (after we drop reg_lock).
1790 */
1791 mmiowb();
b9439491 1792out:
cfb4e624 1793 spin_unlock_irqrestore(&trans_pcie->reg_lock, *flags);
7a65d170
EG		 1794}
1795
4fd442db
EG		 1796static int iwl_trans_pcie_read_mem(struct iwl_trans *trans, u32 addr,
1797 void *buf, int dwords)
1798{
1799 unsigned long flags;
1800 int offs, ret = 0;
1801 u32 *vals = buf;
1802
23ba9340 1803 if (iwl_trans_grab_nic_access(trans, &flags)) {
4fd442db
EG		 1804 iwl_write32(trans, HBUS_TARG_MEM_RADDR, addr);
1805 for (offs = 0; offs < dwords; offs++)
1806 vals[offs] = iwl_read32(trans, HBUS_TARG_MEM_RDAT);
e56b04ef 1807 iwl_trans_release_nic_access(trans, &flags);
4fd442db
EG		 1808 } else {
1809 ret = -EBUSY;
1810 }
4fd442db
EG		 1811 return ret;
1812}
1813
1814static int iwl_trans_pcie_write_mem(struct iwl_trans *trans, u32 addr,
bf0fd5da 1815 const void *buf, int dwords)
4fd442db
EG		 1816{
1817 unsigned long flags;
1818 int offs, ret = 0;
bf0fd5da 1819 const u32 *vals = buf;
4fd442db 1820
23ba9340 1821 if (iwl_trans_grab_nic_access(trans, &flags)) {
4fd442db
EG		 1822 iwl_write32(trans, HBUS_TARG_MEM_WADDR, addr);
1823 for (offs = 0; offs < dwords; offs++)
01387ffd
EG		 1824 iwl_write32(trans, HBUS_TARG_MEM_WDAT,
1825 vals ? vals[offs] : 0);
e56b04ef 1826 iwl_trans_release_nic_access(trans, &flags);
4fd442db
EG		 1827 } else {
1828 ret = -EBUSY;
1829 }
4fd442db
EG		 1830 return ret;
1831}
7a65d170 1832
e0b8d405
EG		 1833static void iwl_trans_pcie_freeze_txq_timer(struct iwl_trans *trans,
1834 unsigned long txqs,
1835 bool freeze)
1836{
1837 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1838 int queue;
1839
1840 for_each_set_bit(queue, &txqs, BITS_PER_LONG) {
1841 struct iwl_txq *txq = &trans_pcie->txq[queue];
1842 unsigned long now;
1843
1844 spin_lock_bh(&txq->lock);
1845
1846 now = jiffies;
1847
1848 if (txq->frozen == freeze)
1849 goto next_queue;
1850
1851 IWL_DEBUG_TX_QUEUES(trans, "%s TXQ %d\n",
1852 freeze ? "Freezing" : "Waking", queue);
1853
1854 txq->frozen = freeze;
1855
1856 if (txq->q.read_ptr == txq->q.write_ptr)
1857 goto next_queue;
1858
1859 if (freeze) {
1860 if (unlikely(time_after(now,
1861 txq->stuck_timer.expires))) {
1862 /*
1863 * The timer should have fired, maybe it is
1864 * spinning right now on the lock.
1865 */
1866 goto next_queue;
1867 }
1868 /* remember how long until the timer fires */
1869 txq->frozen_expiry_remainder =
1870 txq->stuck_timer.expires - now;
1871 del_timer(&txq->stuck_timer);
1872 goto next_queue;
1873 }
1874
1875 /*
1876 * Wake a non-empty queue -> arm timer with the
1877 * remainder before it froze
1878 */
1879 mod_timer(&txq->stuck_timer,
1880 now + txq->frozen_expiry_remainder);
1881
1882next_queue:
1883 spin_unlock_bh(&txq->lock);
1884 }
1885}
1886
0cd58eaa
EG		 1887static void iwl_trans_pcie_block_txq_ptrs(struct iwl_trans *trans, bool block)
1888{
1889 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1890 int i;
1891
1892 for (i = 0; i < trans->cfg->base_params->num_of_queues; i++) {
1893 struct iwl_txq *txq = &trans_pcie->txq[i];
1894
1895 if (i == trans_pcie->cmd_queue)
1896 continue;
1897
1898 spin_lock_bh(&txq->lock);
1899
1900 if (!block && !(WARN_ON_ONCE(!txq->block))) {
1901 txq->block--;
1902 if (!txq->block) {
1903 iwl_write32(trans, HBUS_TARG_WRPTR,
1904 txq->q.write_ptr | (i << 8));
1905 }
1906 } else if (block) {
1907 txq->block++;
1908 }
1909
1910 spin_unlock_bh(&txq->lock);
1911 }
1912}
1913
5f178cd2
EG		 1914#define IWL_FLUSH_WAIT_MS 2000
1915
3cafdbe6 1916static int iwl_trans_pcie_wait_txq_empty(struct iwl_trans *trans, u32 txq_bm)
5f178cd2 1917{
8ad71bef 1918 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
990aa6d7 1919 struct iwl_txq *txq;
5f178cd2
EG		 1920 struct iwl_queue *q;
1921 int cnt;
1922 unsigned long now = jiffies;
1c3fea82
EG		 1923 u32 scd_sram_addr;
1924 u8 buf[16];
5f178cd2
EG		 1925 int ret = 0;
1926
1927 /* waiting for all the tx frames complete might take a while */
035f7ff2 1928 for (cnt = 0; cnt < trans->cfg->base_params->num_of_queues; cnt++) {
fa1a91fd
EG		 1929 u8 wr_ptr;
1930
9ba1947a 1931 if (cnt == trans_pcie->cmd_queue)
5f178cd2 1932 continue;
3cafdbe6
EG		 1933 if (!test_bit(cnt, trans_pcie->queue_used))
1934 continue;
1935 if (!(BIT(cnt) & txq_bm))
1936 continue;
748fa67c
EG		 1937
1938 IWL_DEBUG_TX_QUEUES(trans, "Emptying queue %d...\n", cnt);
8ad71bef 1939 txq = &trans_pcie->txq[cnt];
5f178cd2 1940 q = &txq->q;
fa1a91fd
EG		 1941 wr_ptr = ACCESS_ONCE(q->write_ptr);
1942
1943 while (q->read_ptr != ACCESS_ONCE(q->write_ptr) &&
1944 !time_after(jiffies,
1945 now + msecs_to_jiffies(IWL_FLUSH_WAIT_MS))) {
1946 u8 write_ptr = ACCESS_ONCE(q->write_ptr);
1947
1948 if (WARN_ONCE(wr_ptr != write_ptr,
1949 "WR pointer moved while flushing %d -> %d\n",
1950 wr_ptr, write_ptr))
1951 return -ETIMEDOUT;
192185d6 1952 usleep_range(1000, 2000);
fa1a91fd 1953 }
5f178cd2
EG		 1954
1955 if (q->read_ptr != q->write_ptr) {
1c3fea82
EG		 1956 IWL_ERR(trans,
1957 "fail to flush all tx fifo queues Q %d\n", cnt);
5f178cd2
EG		 1958 ret = -ETIMEDOUT;
1959 break;
1960 }
748fa67c 1961 IWL_DEBUG_TX_QUEUES(trans, "Queue %d is now empty.\n", cnt);
5f178cd2 1962 }
1c3fea82
EG		 1963
1964 if (!ret)
1965 return 0;
1966
1967 IWL_ERR(trans, "Current SW read_ptr %d write_ptr %d\n",
1968 txq->q.read_ptr, txq->q.write_ptr);
1969
1970 scd_sram_addr = trans_pcie->scd_base_addr +
1971 SCD_TX_STTS_QUEUE_OFFSET(txq->q.id);
1972 iwl_trans_read_mem_bytes(trans, scd_sram_addr, buf, sizeof(buf));
1973
1974 iwl_print_hex_error(trans, buf, sizeof(buf));
1975
1976 for (cnt = 0; cnt < FH_TCSR_CHNL_NUM; cnt++)
1977 IWL_ERR(trans, "FH TRBs(%d) = 0x%08x\n", cnt,
1978 iwl_read_direct32(trans, FH_TX_TRB_REG(cnt)));
1979
1980 for (cnt = 0; cnt < trans->cfg->base_params->num_of_queues; cnt++) {
1981 u32 status = iwl_read_prph(trans, SCD_QUEUE_STATUS_BITS(cnt));
1982 u8 fifo = (status >> SCD_QUEUE_STTS_REG_POS_TXF) & 0x7;
1983 bool active = !!(status & BIT(SCD_QUEUE_STTS_REG_POS_ACTIVE));
1984 u32 tbl_dw =
1985 iwl_trans_read_mem32(trans, trans_pcie->scd_base_addr +
1986 SCD_TRANS_TBL_OFFSET_QUEUE(cnt));
1987
1988 if (cnt & 0x1)
1989 tbl_dw = (tbl_dw & 0xFFFF0000) >> 16;
1990 else
1991 tbl_dw = tbl_dw & 0x0000FFFF;
1992
1993 IWL_ERR(trans,
1994 "Q %d is %sactive and mapped to fifo %d ra_tid 0x%04x [%d,%d]\n",
1995 cnt, active ? "" : "in", fifo, tbl_dw,
83f32a4b
JB		 1996 iwl_read_prph(trans, SCD_QUEUE_RDPTR(cnt)) &
1997 (TFD_QUEUE_SIZE_MAX - 1),
1c3fea82
EG		 1998 iwl_read_prph(trans, SCD_QUEUE_WRPTR(cnt)));
1999 }
2000
5f178cd2
EG		 2001 return ret;
2002}
2003
e139dc4a
LE		 2004static void iwl_trans_pcie_set_bits_mask(struct iwl_trans *trans, u32 reg,
2005 u32 mask, u32 value)
2006{
e56b04ef 2007 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
e139dc4a
LE		 2008 unsigned long flags;
2009
e56b04ef 2010 spin_lock_irqsave(&trans_pcie->reg_lock, flags);
e139dc4a 2011 __iwl_trans_pcie_set_bits_mask(trans, reg, mask, value);
e56b04ef 2012 spin_unlock_irqrestore(&trans_pcie->reg_lock, flags);
e139dc4a
LE		 2013}
2014
c24c7f58 2015static void iwl_trans_pcie_ref(struct iwl_trans *trans)
7616f334
EP		 2016{
2017 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
7616f334
EP		 2018
2019 if (iwlwifi_mod_params.d0i3_disable)
2020 return;
2021
b3ff1270 2022 pm_runtime_get(&trans_pcie->pci_dev->dev);
5d93f3a2
LC		 2023
2024#ifdef CONFIG_PM
2025 IWL_DEBUG_RPM(trans, "runtime usage count: %d\n",
2026 atomic_read(&trans_pcie->pci_dev->dev.power.usage_count));
2027#endif /* CONFIG_PM */
7616f334
EP		 2028}
2029
c24c7f58 2030static void iwl_trans_pcie_unref(struct iwl_trans *trans)
7616f334
EP		 2031{
2032 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
7616f334
EP		 2033
2034 if (iwlwifi_mod_params.d0i3_disable)
2035 return;
2036
b3ff1270
LC		 2037 pm_runtime_mark_last_busy(&trans_pcie->pci_dev->dev);
2038 pm_runtime_put_autosuspend(&trans_pcie->pci_dev->dev);
b3ff1270 2039
5d93f3a2
LC		 2040#ifdef CONFIG_PM
2041 IWL_DEBUG_RPM(trans, "runtime usage count: %d\n",
2042 atomic_read(&trans_pcie->pci_dev->dev.power.usage_count));
2043#endif /* CONFIG_PM */
7616f334
EP		 2044}
2045
ff620849
EG		 2046static const char *get_csr_string(int cmd)
2047{
d9fb6465 2048#define IWL_CMD(x) case x: return #x
ff620849
EG		 2049 switch (cmd) {
2050 IWL_CMD(CSR_HW_IF_CONFIG_REG);
2051 IWL_CMD(CSR_INT_COALESCING);
2052 IWL_CMD(CSR_INT);
2053 IWL_CMD(CSR_INT_MASK);
2054 IWL_CMD(CSR_FH_INT_STATUS);
2055 IWL_CMD(CSR_GPIO_IN);
2056 IWL_CMD(CSR_RESET);
2057 IWL_CMD(CSR_GP_CNTRL);
2058 IWL_CMD(CSR_HW_REV);
2059 IWL_CMD(CSR_EEPROM_REG);
2060 IWL_CMD(CSR_EEPROM_GP);
2061 IWL_CMD(CSR_OTP_GP_REG);
2062 IWL_CMD(CSR_GIO_REG);
2063 IWL_CMD(CSR_GP_UCODE_REG);
2064 IWL_CMD(CSR_GP_DRIVER_REG);
2065 IWL_CMD(CSR_UCODE_DRV_GP1);
2066 IWL_CMD(CSR_UCODE_DRV_GP2);
2067 IWL_CMD(CSR_LED_REG);
2068 IWL_CMD(CSR_DRAM_INT_TBL_REG);
2069 IWL_CMD(CSR_GIO_CHICKEN_BITS);
2070 IWL_CMD(CSR_ANA_PLL_CFG);
2071 IWL_CMD(CSR_HW_REV_WA_REG);
a812cba9 2072 IWL_CMD(CSR_MONITOR_STATUS_REG);
ff620849
EG		 2073 IWL_CMD(CSR_DBG_HPET_MEM_REG);
2074 default:
2075 return "UNKNOWN";
2076 }
d9fb6465 2077#undef IWL_CMD
ff620849
EG		 2078}
2079
990aa6d7 2080void iwl_pcie_dump_csr(struct iwl_trans *trans)
ff620849
EG		 2081{
2082 int i;
2083 static const u32 csr_tbl[] = {
2084 CSR_HW_IF_CONFIG_REG,
2085 CSR_INT_COALESCING,
2086 CSR_INT,
2087 CSR_INT_MASK,
2088 CSR_FH_INT_STATUS,
2089 CSR_GPIO_IN,
2090 CSR_RESET,
2091 CSR_GP_CNTRL,
2092 CSR_HW_REV,
2093 CSR_EEPROM_REG,
2094 CSR_EEPROM_GP,
2095 CSR_OTP_GP_REG,
2096 CSR_GIO_REG,
2097 CSR_GP_UCODE_REG,
2098 CSR_GP_DRIVER_REG,
2099 CSR_UCODE_DRV_GP1,
2100 CSR_UCODE_DRV_GP2,
2101 CSR_LED_REG,
2102 CSR_DRAM_INT_TBL_REG,
2103 CSR_GIO_CHICKEN_BITS,
2104 CSR_ANA_PLL_CFG,
a812cba9 2105 CSR_MONITOR_STATUS_REG,
ff620849
EG		 2106 CSR_HW_REV_WA_REG,
2107 CSR_DBG_HPET_MEM_REG
2108 };
2109 IWL_ERR(trans, "CSR values:\n");
2110 IWL_ERR(trans, "(2nd byte of CSR_INT_COALESCING is "
2111 "CSR_INT_PERIODIC_REG)\n");
2112 for (i = 0; i < ARRAY_SIZE(csr_tbl); i++) {
2113 IWL_ERR(trans, " %25s: 0X%08x\n",
2114 get_csr_string(csr_tbl[i]),
1042db2a 2115 iwl_read32(trans, csr_tbl[i]));
ff620849
EG		 2116 }
2117}
2118
87e5666c
EG		 2119#ifdef CONFIG_IWLWIFI_DEBUGFS
2120/* create and remove of files */
2121#define DEBUGFS_ADD_FILE(name, parent, mode) do { \
5a878bf6 2122 if (!debugfs_create_file(#name, mode, parent, trans, \
87e5666c 2123 &iwl_dbgfs_##name##_ops)) \
9da987ac 2124 goto err; \
87e5666c
EG		 2125} while (0)
2126
2127/* file operation */
87e5666c 2128#define DEBUGFS_READ_FILE_OPS(name) \
87e5666c
EG		 2129static const struct file_operations iwl_dbgfs_##name##_ops = { \
2130 .read = iwl_dbgfs_##name##_read, \
234e3405 2131 .open = simple_open, \
87e5666c
EG		 2132 .llseek = generic_file_llseek, \
2133};
2134
16db88ba 2135#define DEBUGFS_WRITE_FILE_OPS(name) \
16db88ba
EG		 2136static const struct file_operations iwl_dbgfs_##name##_ops = { \
2137 .write = iwl_dbgfs_##name##_write, \
234e3405 2138 .open = simple_open, \
16db88ba
EG		 2139 .llseek = generic_file_llseek, \
2140};
2141
87e5666c 2142#define DEBUGFS_READ_WRITE_FILE_OPS(name) \
87e5666c
EG		 2143static const struct file_operations iwl_dbgfs_##name##_ops = { \
2144 .write = iwl_dbgfs_##name##_write, \
2145 .read = iwl_dbgfs_##name##_read, \
234e3405 2146 .open = simple_open, \
87e5666c
EG		 2147 .llseek = generic_file_llseek, \
2148};
2149
87e5666c 2150static ssize_t iwl_dbgfs_tx_queue_read(struct file *file,
20d3b647
JB		 2151 char __user *user_buf,
2152 size_t count, loff_t *ppos)
8ad71bef 2153{
5a878bf6 2154 struct iwl_trans *trans = file->private_data;
8ad71bef 2155 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
990aa6d7 2156 struct iwl_txq *txq;
87e5666c
EG		 2157 struct iwl_queue *q;
2158 char *buf;
2159 int pos = 0;
2160 int cnt;
2161 int ret;
1745e440
WYG		 2162 size_t bufsz;
2163
e0b8d405 2164 bufsz = sizeof(char) * 75 * trans->cfg->base_params->num_of_queues;
87e5666c 2165
f9e75447 2166 if (!trans_pcie->txq)
87e5666c 2167 return -EAGAIN;
f9e75447 2168
87e5666c
EG		 2169 buf = kzalloc(bufsz, GFP_KERNEL);
2170 if (!buf)
2171 return -ENOMEM;
2172
035f7ff2 2173 for (cnt = 0; cnt < trans->cfg->base_params->num_of_queues; cnt++) {
8ad71bef 2174 txq = &trans_pcie->txq[cnt];
87e5666c
EG		 2175 q = &txq->q;
2176 pos += scnprintf(buf + pos, bufsz - pos,
e0b8d405 2177 "hwq %.2d: read=%u write=%u use=%d stop=%d need_update=%d frozen=%d%s\n",
87e5666c 2178 cnt, q->read_ptr, q->write_ptr,
9eae88fa 2179 !!test_bit(cnt, trans_pcie->queue_used),
f40faf62 2180 !!test_bit(cnt, trans_pcie->queue_stopped),
e0b8d405 2181 txq->need_update, txq->frozen,
f40faf62 2182 (cnt == trans_pcie->cmd_queue ? " HCMD" : ""));
87e5666c
EG		 2183 }
2184 ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
2185 kfree(buf);
2186 return ret;
2187}
2188
2189static ssize_t iwl_dbgfs_rx_queue_read(struct file *file,
20d3b647
JB		 2190 char __user *user_buf,
2191 size_t count, loff_t *ppos)
2192{
5a878bf6 2193 struct iwl_trans *trans = file->private_data;
20d3b647 2194 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
78485054
SS		 2195 char *buf;
2196 int pos = 0, i, ret;
2197 size_t bufsz = sizeof(buf);
2198
2199 bufsz = sizeof(char) * 121 * trans->num_rx_queues;
2200
2201 if (!trans_pcie->rxq)
2202 return -EAGAIN;
2203
2204 buf = kzalloc(bufsz, GFP_KERNEL);
2205 if (!buf)
2206 return -ENOMEM;
2207
2208 for (i = 0; i < trans->num_rx_queues && pos < bufsz; i++) {
2209 struct iwl_rxq *rxq = &trans_pcie->rxq[i];
2210
2211 pos += scnprintf(buf + pos, bufsz - pos, "queue#: %2d\n",
2212 i);
2213 pos += scnprintf(buf + pos, bufsz - pos, "\tread: %u\n",
2214 rxq->read);
2215 pos += scnprintf(buf + pos, bufsz - pos, "\twrite: %u\n",
2216 rxq->write);
2217 pos += scnprintf(buf + pos, bufsz - pos, "\twrite_actual: %u\n",
2218 rxq->write_actual);
2219 pos += scnprintf(buf + pos, bufsz - pos, "\tneed_update: %2d\n",
2220 rxq->need_update);
2221 pos += scnprintf(buf + pos, bufsz - pos, "\tfree_count: %u\n",
2222 rxq->free_count);
2223 if (rxq->rb_stts) {
2224 pos += scnprintf(buf + pos, bufsz - pos,
2225 "\tclosed_rb_num: %u\n",
2226 le16_to_cpu(rxq->rb_stts->closed_rb_num) &
2227 0x0FFF);
2228 } else {
2229 pos += scnprintf(buf + pos, bufsz - pos,
2230 "\tclosed_rb_num: Not Allocated\n");
60c0a88f 2231 }
87e5666c 2232 }
78485054
SS		 2233 ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
2234 kfree(buf);
2235
2236 return ret;
87e5666c
EG		 2237}
2238
1f7b6172
EG		 2239static ssize_t iwl_dbgfs_interrupt_read(struct file *file,
2240 char __user *user_buf,
20d3b647
JB		 2241 size_t count, loff_t *ppos)
2242{
1f7b6172 2243 struct iwl_trans *trans = file->private_data;
20d3b647 2244 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1f7b6172
EG		 2245 struct isr_statistics *isr_stats = &trans_pcie->isr_stats;
2246
2247 int pos = 0;
2248 char *buf;
2249 int bufsz = 24 * 64; /* 24 items * 64 char per item */
2250 ssize_t ret;
2251
2252 buf = kzalloc(bufsz, GFP_KERNEL);
f9e75447 2253 if (!buf)
1f7b6172 2254 return -ENOMEM;
1f7b6172
EG		 2255
2256 pos += scnprintf(buf + pos, bufsz - pos,
2257 "Interrupt Statistics Report:\n");
2258
2259 pos += scnprintf(buf + pos, bufsz - pos, "HW Error:\t\t\t %u\n",
2260 isr_stats->hw);
2261 pos += scnprintf(buf + pos, bufsz - pos, "SW Error:\t\t\t %u\n",
2262 isr_stats->sw);
2263 if (isr_stats->sw || isr_stats->hw) {
2264 pos += scnprintf(buf + pos, bufsz - pos,
2265 "\tLast Restarting Code: 0x%X\n",
2266 isr_stats->err_code);
2267 }
2268#ifdef CONFIG_IWLWIFI_DEBUG
2269 pos += scnprintf(buf + pos, bufsz - pos, "Frame transmitted:\t\t %u\n",
2270 isr_stats->sch);
2271 pos += scnprintf(buf + pos, bufsz - pos, "Alive interrupt:\t\t %u\n",
2272 isr_stats->alive);
2273#endif
2274 pos += scnprintf(buf + pos, bufsz - pos,
2275 "HW RF KILL switch toggled:\t %u\n", isr_stats->rfkill);
2276
2277 pos += scnprintf(buf + pos, bufsz - pos, "CT KILL:\t\t\t %u\n",
2278 isr_stats->ctkill);
2279
2280 pos += scnprintf(buf + pos, bufsz - pos, "Wakeup Interrupt:\t\t %u\n",
2281 isr_stats->wakeup);
2282
2283 pos += scnprintf(buf + pos, bufsz - pos,
2284 "Rx command responses:\t\t %u\n", isr_stats->rx);
2285
2286 pos += scnprintf(buf + pos, bufsz - pos, "Tx/FH interrupt:\t\t %u\n",
2287 isr_stats->tx);
2288
2289 pos += scnprintf(buf + pos, bufsz - pos, "Unexpected INTA:\t\t %u\n",
2290 isr_stats->unhandled);
2291
2292 ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
2293 kfree(buf);
2294 return ret;
2295}
2296
2297static ssize_t iwl_dbgfs_interrupt_write(struct file *file,
2298 const char __user *user_buf,
2299 size_t count, loff_t *ppos)
2300{
2301 struct iwl_trans *trans = file->private_data;
20d3b647 2302 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1f7b6172
EG		 2303 struct isr_statistics *isr_stats = &trans_pcie->isr_stats;
2304
2305 char buf[8];
2306 int buf_size;
2307 u32 reset_flag;
2308
2309 memset(buf, 0, sizeof(buf));
2310 buf_size = min(count, sizeof(buf) - 1);
2311 if (copy_from_user(buf, user_buf, buf_size))
2312 return -EFAULT;
2313 if (sscanf(buf, "%x", &reset_flag) != 1)
2314 return -EFAULT;
2315 if (reset_flag == 0)
2316 memset(isr_stats, 0, sizeof(*isr_stats));
2317
2318 return count;
2319}
2320
16db88ba 2321static ssize_t iwl_dbgfs_csr_write(struct file *file,
20d3b647
JB		 2322 const char __user *user_buf,
2323 size_t count, loff_t *ppos)
16db88ba
EG		 2324{
2325 struct iwl_trans *trans = file->private_data;
2326 char buf[8];
2327 int buf_size;
2328 int csr;
2329
2330 memset(buf, 0, sizeof(buf));
2331 buf_size = min(count, sizeof(buf) - 1);
2332 if (copy_from_user(buf, user_buf, buf_size))
2333 return -EFAULT;
2334 if (sscanf(buf, "%d", &csr) != 1)
2335 return -EFAULT;
2336
990aa6d7 2337 iwl_pcie_dump_csr(trans);
16db88ba
EG		 2338
2339 return count;
2340}
2341
16db88ba 2342static ssize_t iwl_dbgfs_fh_reg_read(struct file *file,
20d3b647
JB		 2343 char __user *user_buf,
2344 size_t count, loff_t *ppos)
16db88ba
EG		 2345{
2346 struct iwl_trans *trans = file->private_data;
94543a8d 2347 char *buf = NULL;
56c2477f 2348 ssize_t ret;
16db88ba 2349
56c2477f
JB		 2350 ret = iwl_dump_fh(trans, &buf);
2351 if (ret < 0)
2352 return ret;
2353 if (!buf)
2354 return -EINVAL;
2355 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
2356 kfree(buf);
16db88ba
EG		 2357 return ret;
2358}
2359
1f7b6172 2360DEBUGFS_READ_WRITE_FILE_OPS(interrupt);
16db88ba 2361DEBUGFS_READ_FILE_OPS(fh_reg);
87e5666c
EG		 2362DEBUGFS_READ_FILE_OPS(rx_queue);
2363DEBUGFS_READ_FILE_OPS(tx_queue);
16db88ba 2364DEBUGFS_WRITE_FILE_OPS(csr);
87e5666c 2365
f8a1edb7
JB		 2366/* Create the debugfs files and directories */
2367int iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans)
87e5666c 2368{
f8a1edb7
JB		 2369 struct dentry *dir = trans->dbgfs_dir;
2370
87e5666c
EG		 2371 DEBUGFS_ADD_FILE(rx_queue, dir, S_IRUSR);
2372 DEBUGFS_ADD_FILE(tx_queue, dir, S_IRUSR);
1f7b6172 2373 DEBUGFS_ADD_FILE(interrupt, dir, S_IWUSR | S_IRUSR);
16db88ba
EG		 2374 DEBUGFS_ADD_FILE(csr, dir, S_IWUSR);
2375 DEBUGFS_ADD_FILE(fh_reg, dir, S_IRUSR);
87e5666c 2376 return 0;
9da987ac
MV		 2377
2378err:
2379 IWL_ERR(trans, "failed to create the trans debugfs entry\n");
2380 return -ENOMEM;
87e5666c 2381}
aadede6e 2382#endif /*CONFIG_IWLWIFI_DEBUGFS */
4d075007
JB		 2383
2384static u32 iwl_trans_pcie_get_cmdlen(struct iwl_tfd *tfd)
2385{
2386 u32 cmdlen = 0;
2387 int i;
2388
2389 for (i = 0; i < IWL_NUM_OF_TBS; i++)
2390 cmdlen += iwl_pcie_tfd_tb_get_len(tfd, i);
2391
2392 return cmdlen;
2393}
2394
bd7fc617
EG		 2395static u32 iwl_trans_pcie_dump_rbs(struct iwl_trans *trans,
2396 struct iwl_fw_error_dump_data **data,
2397 int allocated_rb_nums)
2398{
2399 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2400 int max_len = PAGE_SIZE << trans_pcie->rx_page_order;
78485054
SS		 2401 /* Dump RBs is supported only for pre-9000 devices (1 queue) */
2402 struct iwl_rxq *rxq = &trans_pcie->rxq[0];
bd7fc617
EG		 2403 u32 i, r, j, rb_len = 0;
2404
2405 spin_lock(&rxq->lock);
2406
2407 r = le16_to_cpu(ACCESS_ONCE(rxq->rb_stts->closed_rb_num)) & 0x0FFF;
2408
2409 for (i = rxq->read, j = 0;
2410 i != r && j < allocated_rb_nums;
2411 i = (i + 1) & RX_QUEUE_MASK, j++) {
2412 struct iwl_rx_mem_buffer *rxb = rxq->queue[i];
2413 struct iwl_fw_error_dump_rb *rb;
2414
2415 dma_unmap_page(trans->dev, rxb->page_dma, max_len,
2416 DMA_FROM_DEVICE);
2417
2418 rb_len += sizeof(**data) + sizeof(*rb) + max_len;
2419
2420 (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RB);
2421 (*data)->len = cpu_to_le32(sizeof(*rb) + max_len);
2422 rb = (void *)(*data)->data;
2423 rb->index = cpu_to_le32(i);
2424 memcpy(rb->data, page_address(rxb->page), max_len);
2425 /* remap the page for the free benefit */
2426 rxb->page_dma = dma_map_page(trans->dev, rxb->page, 0,
2427 max_len,
2428 DMA_FROM_DEVICE);
2429
2430 *data = iwl_fw_error_next_data(*data);
2431 }
2432
2433 spin_unlock(&rxq->lock);
2434
2435 return rb_len;
2436}
473ad712
EG		 2437#define IWL_CSR_TO_DUMP (0x250)
2438
2439static u32 iwl_trans_pcie_dump_csr(struct iwl_trans *trans,
2440 struct iwl_fw_error_dump_data **data)
2441{
2442 u32 csr_len = sizeof(**data) + IWL_CSR_TO_DUMP;
2443 __le32 *val;
2444 int i;
2445
2446 (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_CSR);
2447 (*data)->len = cpu_to_le32(IWL_CSR_TO_DUMP);
2448 val = (void *)(*data)->data;
2449
2450 for (i = 0; i < IWL_CSR_TO_DUMP; i += 4)
2451 *val++ = cpu_to_le32(iwl_trans_pcie_read32(trans, i));
2452
2453 *data = iwl_fw_error_next_data(*data);
2454
2455 return csr_len;
2456}
2457
06d51e0d
LK		 2458static u32 iwl_trans_pcie_fh_regs_dump(struct iwl_trans *trans,
2459 struct iwl_fw_error_dump_data **data)
2460{
2461 u32 fh_regs_len = FH_MEM_UPPER_BOUND - FH_MEM_LOWER_BOUND;
2462 unsigned long flags;
2463 __le32 *val;
2464 int i;
2465
23ba9340 2466 if (!iwl_trans_grab_nic_access(trans, &flags))
06d51e0d
LK		 2467 return 0;
2468
2469 (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_FH_REGS);
2470 (*data)->len = cpu_to_le32(fh_regs_len);
2471 val = (void *)(*data)->data;
2472
2473 for (i = FH_MEM_LOWER_BOUND; i < FH_MEM_UPPER_BOUND; i += sizeof(u32))
2474 *val++ = cpu_to_le32(iwl_trans_pcie_read32(trans, i));
2475
2476 iwl_trans_release_nic_access(trans, &flags);
2477
2478 *data = iwl_fw_error_next_data(*data);
2479
2480 return sizeof(**data) + fh_regs_len;
2481}
2482
cc79ef66
LK		 2483static u32
2484iwl_trans_pci_dump_marbh_monitor(struct iwl_trans *trans,
2485 struct iwl_fw_error_dump_fw_mon *fw_mon_data,
2486 u32 monitor_len)
2487{
2488 u32 buf_size_in_dwords = (monitor_len >> 2);
2489 u32 *buffer = (u32 *)fw_mon_data->data;
2490 unsigned long flags;
2491 u32 i;
2492
23ba9340 2493 if (!iwl_trans_grab_nic_access(trans, &flags))
cc79ef66
LK		 2494 return 0;
2495
14ef1b43 2496 iwl_write_prph_no_grab(trans, MON_DMARB_RD_CTL_ADDR, 0x1);
cc79ef66 2497 for (i = 0; i < buf_size_in_dwords; i++)
14ef1b43
GBA		 2498 buffer[i] = iwl_read_prph_no_grab(trans,
2499 MON_DMARB_RD_DATA_ADDR);
2500 iwl_write_prph_no_grab(trans, MON_DMARB_RD_CTL_ADDR, 0x0);
cc79ef66
LK		 2501
2502 iwl_trans_release_nic_access(trans, &flags);
2503
2504 return monitor_len;
2505}
2506
36fb9017
OG		 2507static u32
2508iwl_trans_pcie_dump_monitor(struct iwl_trans *trans,
2509 struct iwl_fw_error_dump_data **data,
2510 u32 monitor_len)
2511{
2512 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2513 u32 len = 0;
2514
2515 if ((trans_pcie->fw_mon_page &&
2516 trans->cfg->device_family == IWL_DEVICE_FAMILY_7000) ||
2517 trans->dbg_dest_tlv) {
2518 struct iwl_fw_error_dump_fw_mon *fw_mon_data;
2519 u32 base, write_ptr, wrap_cnt;
2520
2521 /* If there was a dest TLV - use the values from there */
2522 if (trans->dbg_dest_tlv) {
2523 write_ptr =
2524 le32_to_cpu(trans->dbg_dest_tlv->write_ptr_reg);
2525 wrap_cnt = le32_to_cpu(trans->dbg_dest_tlv->wrap_count);
2526 base = le32_to_cpu(trans->dbg_dest_tlv->base_reg);
2527 } else {
2528 base = MON_BUFF_BASE_ADDR;
2529 write_ptr = MON_BUFF_WRPTR;
2530 wrap_cnt = MON_BUFF_CYCLE_CNT;
2531 }
2532
2533 (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_FW_MONITOR);
2534 fw_mon_data = (void *)(*data)->data;
2535 fw_mon_data->fw_mon_wr_ptr =
2536 cpu_to_le32(iwl_read_prph(trans, write_ptr));
2537 fw_mon_data->fw_mon_cycle_cnt =
2538 cpu_to_le32(iwl_read_prph(trans, wrap_cnt));
2539 fw_mon_data->fw_mon_base_ptr =
2540 cpu_to_le32(iwl_read_prph(trans, base));
2541
2542 len += sizeof(**data) + sizeof(*fw_mon_data);
2543 if (trans_pcie->fw_mon_page) {
2544 /*
2545 * The firmware is now asserted, it won't write anything
2546 * to the buffer. CPU can take ownership to fetch the
2547 * data. The buffer will be handed back to the device
2548 * before the firmware will be restarted.
2549 */
2550 dma_sync_single_for_cpu(trans->dev,
2551 trans_pcie->fw_mon_phys,
2552 trans_pcie->fw_mon_size,
2553 DMA_FROM_DEVICE);
2554 memcpy(fw_mon_data->data,
2555 page_address(trans_pcie->fw_mon_page),
2556 trans_pcie->fw_mon_size);
2557
2558 monitor_len = trans_pcie->fw_mon_size;
2559 } else if (trans->dbg_dest_tlv->monitor_mode == SMEM_MODE) {
2560 /*
2561 * Update pointers to reflect actual values after
2562 * shifting
2563 */
2564 base = iwl_read_prph(trans, base) <<
2565 trans->dbg_dest_tlv->base_shift;
2566 iwl_trans_read_mem(trans, base, fw_mon_data->data,
2567 monitor_len / sizeof(u32));
2568 } else if (trans->dbg_dest_tlv->monitor_mode == MARBH_MODE) {
2569 monitor_len =
2570 iwl_trans_pci_dump_marbh_monitor(trans,
2571 fw_mon_data,
2572 monitor_len);
2573 } else {
2574 /* Didn't match anything - output no monitor data */
2575 monitor_len = 0;
2576 }
2577
2578 len += monitor_len;
2579 (*data)->len = cpu_to_le32(monitor_len + sizeof(*fw_mon_data));
2580 }
2581
2582 return len;
2583}
2584
2585static struct iwl_trans_dump_data
2586*iwl_trans_pcie_dump_data(struct iwl_trans *trans,
a80c7a69 2587 const struct iwl_fw_dbg_trigger_tlv *trigger)
4d075007
JB		 2588{
2589 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2590 struct iwl_fw_error_dump_data *data;
2591 struct iwl_txq *cmdq = &trans_pcie->txq[trans_pcie->cmd_queue];
2592 struct iwl_fw_error_dump_txcmd *txcmd;
48eb7b34 2593 struct iwl_trans_dump_data *dump_data;
bd7fc617 2594 u32 len, num_rbs;
99684ae3 2595 u32 monitor_len;
4d075007 2596 int i, ptr;
96a6497b
SS		 2597 bool dump_rbs = test_bit(STATUS_FW_ERROR, &trans->status) &&
2598 !trans->cfg->mq_rx_supported;
4d075007 2599
473ad712
EG		 2600 /* transport dump header */
2601 len = sizeof(*dump_data);
2602
2603 /* host commands */
2604 len += sizeof(*data) +
c2d20201
EG		 2605 cmdq->q.n_window * (sizeof(*txcmd) + TFD_MAX_PAYLOAD_SIZE);
2606
473ad712 2607 /* FW monitor */
99684ae3 2608 if (trans_pcie->fw_mon_page) {
c544e9c4 2609 len += sizeof(*data) + sizeof(struct iwl_fw_error_dump_fw_mon) +
99684ae3
LK		 2610 trans_pcie->fw_mon_size;
2611 monitor_len = trans_pcie->fw_mon_size;
2612 } else if (trans->dbg_dest_tlv) {
2613 u32 base, end;
2614
2615 base = le32_to_cpu(trans->dbg_dest_tlv->base_reg);
2616 end = le32_to_cpu(trans->dbg_dest_tlv->end_reg);
2617
2618 base = iwl_read_prph(trans, base) <<
2619 trans->dbg_dest_tlv->base_shift;
2620 end = iwl_read_prph(trans, end) <<
2621 trans->dbg_dest_tlv->end_shift;
2622
2623 /* Make "end" point to the actual end */
cc79ef66
LK		 2624 if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000 ||
2625 trans->dbg_dest_tlv->monitor_mode == MARBH_MODE)
99684ae3
LK		 2626 end += (1 << trans->dbg_dest_tlv->end_shift);
2627 monitor_len = end - base;
2628 len += sizeof(*data) + sizeof(struct iwl_fw_error_dump_fw_mon) +
2629 monitor_len;
2630 } else {
2631 monitor_len = 0;
2632 }
c2d20201 2633
36fb9017
OG		 2634 if (trigger && (trigger->mode & IWL_FW_DBG_TRIGGER_MONITOR_ONLY)) {
2635 dump_data = vzalloc(len);
2636 if (!dump_data)
2637 return NULL;
2638
2639 data = (void *)dump_data->data;
2640 len = iwl_trans_pcie_dump_monitor(trans, &data, monitor_len);
2641 dump_data->len = len;
2642
2643 return dump_data;
2644 }
2645
2646 /* CSR registers */
2647 len += sizeof(*data) + IWL_CSR_TO_DUMP;
2648
36fb9017
OG		 2649 /* FH registers */
2650 len += sizeof(*data) + (FH_MEM_UPPER_BOUND - FH_MEM_LOWER_BOUND);
2651
2652 if (dump_rbs) {
78485054
SS		 2653 /* Dump RBs is supported only for pre-9000 devices (1 queue) */
2654 struct iwl_rxq *rxq = &trans_pcie->rxq[0];
36fb9017 2655 /* RBs */
78485054 2656 num_rbs = le16_to_cpu(ACCESS_ONCE(rxq->rb_stts->closed_rb_num))
36fb9017 2657 & 0x0FFF;
78485054 2658 num_rbs = (num_rbs - rxq->read) & RX_QUEUE_MASK;
36fb9017
OG		 2659 len += num_rbs * (sizeof(*data) +
2660 sizeof(struct iwl_fw_error_dump_rb) +
2661 (PAGE_SIZE << trans_pcie->rx_page_order));
2662 }
2663
48eb7b34
EG		 2664 dump_data = vzalloc(len);
2665 if (!dump_data)
2666 return NULL;
4d075007
JB		 2667
2668 len = 0;
48eb7b34 2669 data = (void *)dump_data->data;
4d075007
JB		 2670 data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_TXCMD);
2671 txcmd = (void *)data->data;
2672 spin_lock_bh(&cmdq->lock);
2673 ptr = cmdq->q.write_ptr;
2674 for (i = 0; i < cmdq->q.n_window; i++) {
2675 u8 idx = get_cmd_index(&cmdq->q, ptr);
2676 u32 caplen, cmdlen;
2677
2678 cmdlen = iwl_trans_pcie_get_cmdlen(&cmdq->tfds[ptr]);
2679 caplen = min_t(u32, TFD_MAX_PAYLOAD_SIZE, cmdlen);
2680
2681 if (cmdlen) {
2682 len += sizeof(*txcmd) + caplen;
2683 txcmd->cmdlen = cpu_to_le32(cmdlen);
2684 txcmd->caplen = cpu_to_le32(caplen);
2685 memcpy(txcmd->data, cmdq->entries[idx].cmd, caplen);
2686 txcmd = (void *)((u8 *)txcmd->data + caplen);
2687 }
2688
2689 ptr = iwl_queue_dec_wrap(ptr);
2690 }
2691 spin_unlock_bh(&cmdq->lock);
2692
2693 data->len = cpu_to_le32(len);
c2d20201 2694 len += sizeof(*data);
67c65f2c
EG		 2695 data = iwl_fw_error_next_data(data);
2696
473ad712 2697 len += iwl_trans_pcie_dump_csr(trans, &data);
06d51e0d 2698 len += iwl_trans_pcie_fh_regs_dump(trans, &data);
bd7fc617
EG		 2699 if (dump_rbs)
2700 len += iwl_trans_pcie_dump_rbs(trans, &data, num_rbs);
c2d20201 2701
36fb9017 2702 len += iwl_trans_pcie_dump_monitor(trans, &data, monitor_len);
c2d20201 2703
48eb7b34
EG		 2704 dump_data->len = len;
2705
2706 return dump_data;
4d075007 2707}
87e5666c 2708
4cbb8e50
LC		 2709#ifdef CONFIG_PM_SLEEP
2710static int iwl_trans_pcie_suspend(struct iwl_trans *trans)
2711{
2712 if (trans->runtime_pm_mode == IWL_PLAT_PM_MODE_D0I3)
2713 return iwl_pci_fw_enter_d0i3(trans);
2714
2715 return 0;
2716}
2717
2718static void iwl_trans_pcie_resume(struct iwl_trans *trans)
2719{
2720 if (trans->runtime_pm_mode == IWL_PLAT_PM_MODE_D0I3)
2721 iwl_pci_fw_exit_d0i3(trans);
2722}
2723#endif /* CONFIG_PM_SLEEP */
2724
d1ff5253 2725static const struct iwl_trans_ops trans_ops_pcie = {
57a1dc89 2726 .start_hw = iwl_trans_pcie_start_hw,
a4082843 2727 .op_mode_leave = iwl_trans_pcie_op_mode_leave,
ed6a3803 2728 .fw_alive = iwl_trans_pcie_fw_alive,
cf614297 2729 .start_fw = iwl_trans_pcie_start_fw,
e6bb4c9c 2730 .stop_device = iwl_trans_pcie_stop_device,
48d42c42 2731
ddaf5a5b
JB		 2732 .d3_suspend = iwl_trans_pcie_d3_suspend,
2733 .d3_resume = iwl_trans_pcie_d3_resume,
2dd4f9f7 2734
4cbb8e50
LC		 2735#ifdef CONFIG_PM_SLEEP
2736 .suspend = iwl_trans_pcie_suspend,
2737 .resume = iwl_trans_pcie_resume,
2738#endif /* CONFIG_PM_SLEEP */
2739
f02831be 2740 .send_cmd = iwl_trans_pcie_send_hcmd,
c85eb619 2741
e6bb4c9c 2742 .tx = iwl_trans_pcie_tx,
a0eaad71 2743 .reclaim = iwl_trans_pcie_reclaim,
34c1b7ba 2744
d0624be6 2745 .txq_disable = iwl_trans_pcie_txq_disable,
4beaf6c2 2746 .txq_enable = iwl_trans_pcie_txq_enable,
34c1b7ba 2747
42db09c1
LK		 2748 .txq_set_shared_mode = iwl_trans_pcie_txq_set_shared_mode,
2749
990aa6d7 2750 .wait_tx_queue_empty = iwl_trans_pcie_wait_txq_empty,
e0b8d405 2751 .freeze_txq_timer = iwl_trans_pcie_freeze_txq_timer,
0cd58eaa 2752 .block_txq_ptrs = iwl_trans_pcie_block_txq_ptrs,
5f178cd2 2753
03905495
EG		 2754 .write8 = iwl_trans_pcie_write8,
2755 .write32 = iwl_trans_pcie_write32,
2756 .read32 = iwl_trans_pcie_read32,
6a06b6c1
EG		 2757 .read_prph = iwl_trans_pcie_read_prph,
2758 .write_prph = iwl_trans_pcie_write_prph,
4fd442db
EG		 2759 .read_mem = iwl_trans_pcie_read_mem,
2760 .write_mem = iwl_trans_pcie_write_mem,
c6f600fc 2761 .configure = iwl_trans_pcie_configure,
47107e84 2762 .set_pmi = iwl_trans_pcie_set_pmi,
7a65d170 2763 .grab_nic_access = iwl_trans_pcie_grab_nic_access,
e139dc4a
LE		 2764 .release_nic_access = iwl_trans_pcie_release_nic_access,
2765 .set_bits_mask = iwl_trans_pcie_set_bits_mask,
4d075007 2766
7616f334
EP		 2767 .ref = iwl_trans_pcie_ref,
2768 .unref = iwl_trans_pcie_unref,
2769
4d075007 2770 .dump_data = iwl_trans_pcie_dump_data,
e6bb4c9c 2771};
a42a1844 2772
87ce05a2 2773struct iwl_trans *iwl_trans_pcie_alloc(struct pci_dev *pdev,
035f7ff2
EG		 2774 const struct pci_device_id *ent,
2775 const struct iwl_cfg *cfg)
a42a1844 2776{
a42a1844
EG		 2777 struct iwl_trans_pcie *trans_pcie;
2778 struct iwl_trans *trans;
96a6497b 2779 int ret, addr_size;
a42a1844 2780
7b501d10
JB		 2781 trans = iwl_trans_alloc(sizeof(struct iwl_trans_pcie),
2782 &pdev->dev, cfg, &trans_ops_pcie, 0);
2783 if (!trans)
2784 return ERR_PTR(-ENOMEM);
a42a1844 2785
206eea78
JB		 2786 trans->max_skb_frags = IWL_PCIE_MAX_FRAGS;
2787
a42a1844
EG		 2788 trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2789
a42a1844 2790 trans_pcie->trans = trans;
7b11488f 2791 spin_lock_init(&trans_pcie->irq_lock);
e56b04ef 2792 spin_lock_init(&trans_pcie->reg_lock);
fa9f3281 2793 mutex_init(&trans_pcie->mutex);
13df1aab 2794 init_waitqueue_head(&trans_pcie->ucode_write_waitq);
6eb5e529
EG		 2795 trans_pcie->tso_hdr_page = alloc_percpu(struct iwl_tso_hdr_page);
2796 if (!trans_pcie->tso_hdr_page) {
2797 ret = -ENOMEM;
2798 goto out_no_pci;
2799 }
a42a1844 2800
af3f2f74
EG		 2801 ret = pci_enable_device(pdev);
2802 if (ret)
d819c6cf
JB		 2803 goto out_no_pci;
2804
f2532b04
EG		 2805 if (!cfg->base_params->pcie_l1_allowed) {
2806 /*
2807 * W/A - seems to solve weird behavior. We need to remove this
2808 * if we don't want to stay in L1 all the time. This wastes a
2809 * lot of power.
2810 */
2811 pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S |
2812 PCIE_LINK_STATE_L1 |
2813 PCIE_LINK_STATE_CLKPM);
2814 }
a42a1844 2815
96a6497b
SS		 2816 if (cfg->mq_rx_supported)
2817 addr_size = 64;
2818 else
2819 addr_size = 36;
2820
a42a1844
EG		 2821 pci_set_master(pdev);
2822
96a6497b 2823 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(addr_size));
af3f2f74 2824 if (!ret)
96a6497b
SS		 2825 ret = pci_set_consistent_dma_mask(pdev,
2826 DMA_BIT_MASK(addr_size));
af3f2f74
EG		 2827 if (ret) {
2828 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2829 if (!ret)
2830 ret = pci_set_consistent_dma_mask(pdev,
20d3b647 2831 DMA_BIT_MASK(32));
a42a1844 2832 /* both attempts failed: */
af3f2f74 2833 if (ret) {
6a4b09f8 2834 dev_err(&pdev->dev, "No suitable DMA available\n");
a42a1844
EG		 2835 goto out_pci_disable_device;
2836 }
2837 }
2838
af3f2f74
EG		 2839 ret = pci_request_regions(pdev, DRV_NAME);
2840 if (ret) {
6a4b09f8 2841 dev_err(&pdev->dev, "pci_request_regions failed\n");
a42a1844
EG		 2842 goto out_pci_disable_device;
2843 }
2844
05f5b97e 2845 trans_pcie->hw_base = pci_ioremap_bar(pdev, 0);
a42a1844 2846 if (!trans_pcie->hw_base) {
6a4b09f8 2847 dev_err(&pdev->dev, "pci_ioremap_bar failed\n");
af3f2f74 2848 ret = -ENODEV;
a42a1844
EG		 2849 goto out_pci_release_regions;
2850 }
2851
a42a1844
EG		 2852 /* We disable the RETRY_TIMEOUT register (0x41) to keep
2853 * PCI Tx retries from interfering with C3 CPU state */
2854 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2855
83f7a85f
EG		 2856 trans->dev = &pdev->dev;
2857 trans_pcie->pci_dev = pdev;
2858 iwl_disable_interrupts(trans);
2859
08079a49 2860 trans->hw_rev = iwl_read32(trans, CSR_HW_REV);
b513ee7f
LK		 2861 /*
2862 * In the 8000 HW family the format of the 4 bytes of CSR_HW_REV have
2863 * changed, and now the revision step also includes bit 0-1 (no more
2864 * "dash" value). To keep hw_rev backwards compatible - we'll store it
2865 * in the old format.
2866 */
7a42baa6
EH		 2867 if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000) {
2868 unsigned long flags;
7a42baa6 2869
b513ee7f 2870 trans->hw_rev = (trans->hw_rev & 0xfff0) |
1fc0e221 2871 (CSR_HW_REV_STEP(trans->hw_rev << 2) << 2);
b513ee7f 2872
f9e5554c
EG		 2873 ret = iwl_pcie_prepare_card_hw(trans);
2874 if (ret) {
2875 IWL_WARN(trans, "Exit HW not ready\n");
2876 goto out_pci_disable_msi;
2877 }
2878
7a42baa6
EH		 2879 /*
2880 * in-order to recognize C step driver should read chip version
2881 * id located at the AUX bus MISC address space.
2882 */
2883 iwl_set_bit(trans, CSR_GP_CNTRL,
2884 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
2885 udelay(2);
2886
2887 ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
2888 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
2889 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
2890 25000);
2891 if (ret < 0) {
2892 IWL_DEBUG_INFO(trans, "Failed to wake up the nic\n");
2893 goto out_pci_disable_msi;
2894 }
2895
23ba9340 2896 if (iwl_trans_grab_nic_access(trans, &flags)) {
7a42baa6
EH		 2897 u32 hw_step;
2898
14ef1b43 2899 hw_step = iwl_read_prph_no_grab(trans, WFPM_CTRL_REG);
7a42baa6 2900 hw_step |= ENABLE_WFPM;
14ef1b43
GBA		 2901 iwl_write_prph_no_grab(trans, WFPM_CTRL_REG, hw_step);
2902 hw_step = iwl_read_prph_no_grab(trans, AUX_MISC_REG);
7a42baa6
EH		 2903 hw_step = (hw_step >> HW_STEP_LOCATION_BITS) & 0xF;
2904 if (hw_step == 0x3)
2905 trans->hw_rev = (trans->hw_rev & 0xFFFFFFF3) |
2906 (SILICON_C_STEP << 2);
2907 iwl_trans_release_nic_access(trans, &flags);
2908 }
2909 }
2910
1afb0ae4
HD		 2911 trans->hw_rf_id = iwl_read32(trans, CSR_HW_RF_ID);
2912
2e5d4a8f 2913 iwl_pcie_set_interrupt_capa(pdev, trans);
99673ee5 2914 trans->hw_id = (pdev->device << 16) + pdev->subsystem_device;
9ca85961
EG		 2915 snprintf(trans->hw_id_str, sizeof(trans->hw_id_str),
2916 "PCI ID: 0x%04X:0x%04X", pdev->device, pdev->subsystem_device);
a42a1844 2917
69a10b29 2918 /* Initialize the wait queue for commands */
f946b529 2919 init_waitqueue_head(&trans_pcie->wait_command_queue);
69a10b29 2920
4cbb8e50
LC		 2921 init_waitqueue_head(&trans_pcie->d0i3_waitq);
2922
2e5d4a8f
HD		 2923 if (trans_pcie->msix_enabled) {
2924 if (iwl_pcie_init_msix_handler(pdev, trans_pcie))
2925 goto out_pci_release_regions;
2926 } else {
2927 ret = iwl_pcie_alloc_ict(trans);
2928 if (ret)
2929 goto out_pci_disable_msi;
a8b691e6 2930
2e5d4a8f
HD		 2931 ret = request_threaded_irq(pdev->irq, iwl_pcie_isr,
2932 iwl_pcie_irq_handler,
2933 IRQF_SHARED, DRV_NAME, trans);
2934 if (ret) {
2935 IWL_ERR(trans, "Error allocating IRQ %d\n", pdev->irq);
2936 goto out_free_ict;
2937 }
2938 trans_pcie->inta_mask = CSR_INI_SET_MASK;
2939 }
83f7a85f 2940
b3ff1270
LC		 2941#ifdef CONFIG_IWLWIFI_PCIE_RTPM
2942 trans->runtime_pm_mode = IWL_PLAT_PM_MODE_D0I3;
2943#else
2944 trans->runtime_pm_mode = IWL_PLAT_PM_MODE_DISABLED;
2945#endif /* CONFIG_IWLWIFI_PCIE_RTPM */
2946
a42a1844
EG		 2947 return trans;
2948
a8b691e6
JB		 2949out_free_ict:
2950 iwl_pcie_free_ict(trans);
59c647b6
EG		 2951out_pci_disable_msi:
2952 pci_disable_msi(pdev);
a42a1844
EG		 2953out_pci_release_regions:
2954 pci_release_regions(pdev);
2955out_pci_disable_device:
2956 pci_disable_device(pdev);
2957out_no_pci:
6eb5e529 2958 free_percpu(trans_pcie->tso_hdr_page);
7b501d10 2959 iwl_trans_free(trans);
af3f2f74 2960 return ERR_PTR(ret);
a42a1844 2961}
Linux 6.x block layer and io_uring tree(s)